Here is a trajectory of observations, inventory and actions. I'll ask you to tell me at which step important events happened.

Obs 0: You are in the kitchen. In one part of the room you see a fridge that is closed. There is also a dining chair, that has nothing on it. You also see a dishwasher that is closed. In another part of the room you see a trash can that is closed. In one part of the room you see an oven. There is also a cutlery drawer that is closed. You also see a stove. In another part of the room you see a kitchen cupboard that is closed. In one part of the room you see a counter that has a cookbook, a red hot pepper, and a knife on it. 
To the North you see the corridor. To the West you see a closed plain door. 
Inventory 0: Inventory (maximum capacity is 5 items): 
  Your inventory is currently empty.
Action 0: look around
Obs 1: You are in the kitchen. In one part of the room you see a fridge that is closed. There is also a dining chair, that has nothing on it. You also see a dishwasher that is closed. In another part of the room you see a trash can that is closed. In one part of the room you see an oven. There is also a cutlery drawer that is closed. You also see a stove. In another part of the room you see a kitchen cupboard that is closed. In one part of the room you see a counter that has a cookbook, a red hot pepper, and a knife on it. 
To the North you see the corridor. To the West you see a closed plain door. 
Action 1: take cookbook
Obs 2: You take the cookbook.
Action 2: read cookbook
Obs 3: Gather all following ingredients and follow the directions to prepare this tasty meal.
Ingredients:
  salt
  banana
  red hot pepper
Directions:
  chop the banana
  grill the banana
  chop the red hot pepper
  fry the red hot pepper
  prepare meal
Action 3: take knife
Obs 4: You take the knife.
Action 4: take red hot pepper
Obs 5: You take the red hot pepper.
Action 5: open kitchen cupboard
Obs 6: You open the kitchen cupboard. It's empty inside.
Action 6: close kitchen cupboard
Obs 7: You close the kitchen cupboard.
Action 7: open fridge
Obs 8: You open the fridge. The fridge contains an raw egg, a carrot, some parsley.
Action 8: close fridge
Obs 9: You close the fridge.
Action 9: open door to west
Obs 10: You open the plain door, revealing the pantry. 
Action 10: move west
Obs 11: You are in the pantry. In one part of the room you see a folding chair, that has nothing on it. There is also a shelf that has some flour, some salt, some sugar, some vegetable oil, some olive oil, and some peanut oil on it. 
Through an open plain door, to the East you see the kitchen. 
Action 11: take salt
Obs 12: You take the salt.
Action 12: move east
Obs 13: You are in the kitchen. In one part of the room you see a counter, that has nothing on it. There is also a fridge that is closed. You also see a dining chair, that has nothing on it. In another part of the room you see a dishwasher that is closed. In one part of the room you see a trash can that is closed. There is also an oven. You also see a cutlery drawer that is closed. In another part of the room you see a stove. In one part of the room you see a kitchen cupboard that is closed. 
To the North you see the corridor. Through an open plain door, to the West you see the pantry. 
Action 13: move west
Obs 14: You are in the pantry. In one part of the room you see a folding chair, that has nothing on it. There is also a shelf that has some flour, some sugar, some vegetable oil, some olive oil, and some peanut oil on it. 
Through an open plain door, to the East you see the kitchen. 
Action 14: move east
Obs 15: You are in the kitchen. In one part of the room you see a counter, that has nothing on it. There is also a fridge that is closed. You also see a dining chair, that has nothing on it. In another part of the room you see a dishwasher that is closed. In one part of the room you see a trash can that is closed. There is also an oven. You also see a cutlery drawer that is closed. In another part of the room you see a stove. In one part of the room you see a kitchen cupboard that is closed. 
To the North you see the corridor. Through an open plain door, to the West you see the pantry. 
Action 15: move west
Obs 16: You are in the pantry. In one part of the room you see a folding chair, that has nothing on it. There is also a shelf that has some flour, some sugar, some vegetable oil, some olive oil, and some peanut oil on it. 
Through an open plain door, to the East you see the kitchen. 
Action 16: move east
Obs 17: You are in the kitchen. In one part of the room you see a counter, that has nothing on it. There is also a fridge that is closed. You also see a dining chair, that has nothing on it. In another part of the room you see a dishwasher that is closed. In one part of the room you see a trash can that is closed. There is also an oven. You also see a cutlery drawer that is closed. In another part of the room you see a stove. In one part of the room you see a kitchen cupboard that is closed. 
To the North you see the corridor. Through an open plain door, to the West you see the pantry. 
Action 17: move north
Obs 18: You are in the corridor. In one part of the room you see a shoe cabinet that is closed. There is also a key holder, that has nothing on it. You also see a hat rack, that has nothing on it. In another part of the room you see a coat hanger, that has nothing on it. In one part of the room you see a umbrella stand, that has nothing on it. 
To the North you see a closed sliding patio door. To the South you see the kitchen. To the West you see a closed wood door. 
Action 18: open door to north
Obs 19: You open the sliding patio door, revealing the backyard. 
Action 19: move north
Obs 20: You are in the backyard. In one part of the room you see a barbeque. There is also a patio chair, that has nothing on it. You also see a clothes line, that has nothing on it. In another part of the room you see a garden that has a yellow bell pepper, a green hot pepper, and a banana on it. In one part of the room you see a workbench, that has nothing on it. There is also a patio table, that has nothing on it. 
Through an open sliding patio door, to the South you see the corridor. 
Action 20: take banana
Obs 21: You take the banana.
Action 21: move south
Obs 22: You are in the corridor. In one part of the room you see a shoe cabinet that is closed. There is also a key holder, that has nothing on it. You also see a hat rack, that has nothing on it. In another part of the room you see a coat hanger, that has nothing on it. In one part of the room you see a umbrella stand, that has nothing on it. 
Through an open sliding patio door, to the North you see the backyard. To the South you see the kitchen. To the West you see a closed wood door. 
Action 22: move south
Obs 23: You are in the kitchen. In one part of the room you see a counter, that has nothing on it. There is also a fridge that is closed. You also see a dining chair, that has nothing on it. In another part of the room you see a dishwasher that is closed. In one part of the room you see a trash can that is closed. There is also an oven. You also see a cutlery drawer that is closed. In another part of the room you see a stove. In one part of the room you see a kitchen cupboard that is closed. 
To the North you see the corridor. Through an open plain door, to the West you see the pantry. 
Action 23: chop banana
Obs 24: You chop the banana.
Action 24: chop red hot pepper
Obs 25: You chop the red hot pepper.
Action 25: cook red hot pepper in stove
Obs 26: You fry the red hot pepper with the stove.
Action 26: move west
Obs 27: You are in the pantry. In one part of the room you see a folding chair, that has nothing on it. There is also a shelf that has some flour, some sugar, some vegetable oil, some olive oil, and some peanut oil on it. 
Through an open plain door, to the East you see the kitchen. 
Action 27: move east
Obs 28: You are in the kitchen. In one part of the room you see a counter, that has nothing on it. There is also a fridge that is closed. You also see a dining chair, that has nothing on it. In another part of the room you see a dishwasher that is closed. In one part of the room you see a trash can that is closed. There is also an oven. You also see a cutlery drawer that is closed. In another part of the room you see a stove. In one part of the room you see a kitchen cupboard that is closed. 
To the North you see the corridor. Through an open plain door, to the West you see the pantry. 
Action 28: move west
Obs 29: You are in the pantry. In one part of the room you see a folding chair, that has nothing on it. There is also a shelf that has some flour, some sugar, some vegetable oil, some olive oil, and some peanut oil on it. 
Through an open plain door, to the East you see the kitchen. 
Action 29: move east
Obs 30: You are in the kitchen. In one part of the room you see a counter, that has nothing on it. There is also a fridge that is closed. You also see a dining chair, that has nothing on it. In another part of the room you see a dishwasher that is closed. In one part of the room you see a trash can that is closed. There is also an oven. You also see a cutlery drawer that is closed. In another part of the room you see a stove. In one part of the room you see a kitchen cupboard that is closed. 
To the North you see the corridor. Through an open plain door, to the West you see the pantry. 
Action 30: move north
Obs 31: You are in the corridor. In one part of the room you see a shoe cabinet that is closed. There is also a key holder, that has nothing on it. You also see a hat rack, that has nothing on it. In another part of the room you see a coat hanger, that has nothing on it. In one part of the room you see a umbrella stand, that has nothing on it. 
Through an open sliding patio door, to the North you see the backyard. To the South you see the kitchen. To the West you see a closed wood door. 
Action 31: move north
Obs 32: You are in the backyard. In one part of the room you see a garden that has a yellow bell pepper, and a green hot pepper on it. There is also a barbeque. You also see a patio chair, that has nothing on it. In another part of the room you see a clothes line, that has nothing on it. In one part of the room you see a workbench, that has nothing on it. There is also a patio table, that has nothing on it. 
Through an open sliding patio door, to the South you see the corridor. 
Action 32: cook banana in barbeque
Obs 33: You grill the banana with the barbeque.
Action 33: move south
Obs 34: You are in the corridor. In one part of the room you see a shoe cabinet that is closed. There is also a key holder, that has nothing on it. You also see a hat rack, that has nothing on it. In another part of the room you see a coat hanger, that has nothing on it. In one part of the room you see a umbrella stand, that has nothing on it. 
Through an open sliding patio door, to the North you see the backyard. To the South you see the kitchen. To the West you see a closed wood door. 
Action 34: move south
Obs 35: You are in the kitchen. In one part of the room you see a counter, that has nothing on it. There is also a fridge that is closed. You also see a dining chair, that has nothing on it. In another part of the room you see a dishwasher that is closed. In one part of the room you see a trash can that is closed. There is also an oven. You also see a cutlery drawer that is closed. In another part of the room you see a stove. In one part of the room you see a kitchen cupboard that is closed. 
To the North you see the corridor. Through an open plain door, to the West you see the pantry. 
Action 35: prepare meal
Obs 36: Adding the meal to your inventory.
Action 36: eat meal
Obs 37: You eat the meal.  It is delicious.

When did you grill the banana? Step 33.
When did you enter the corridor? Step 18. 
When did you take the knife? Step 3.
When did you chop the banana? Step 23.
When did you close the fridge? Step 9.
When did you read the cookbook? Step 2.
When did you open the door to the west? Step 9.
When did you take the cookbook? Step 1.
When did you prepare the meal? Step 35.
When did you take the red hot pepper? Step 4.
When did you chop the red hot pepper? Step 24.
When did you enter the backyard? Step 20.
When did you take the salt? Step 11.
When did you cook the red hot pepper? Step 25.
When did you eat the meal? Step 37.
When did you see a counter? Step 0.

What other goal could you have achieved here?

Some other possible goals could have been to:
-plant the banana peel in the garden
-make a smoothie with the banana, red hot pepper, and egg
-bake the banana in the oven
-make a salt solution with the salt and water from the sink

What yes/no questions could you ask about this world and what are the answers? After the answer, tell when you found the answer (which step).
-Is there a sink in the kitchen? Yes, step 0.
-Is the door to the west the only door in the kitchen? No, there is also a door to the pantry, step 10.
-Is the backyard the only place with a barbeque? No, there is also a barbeque in the park, step 38.
-Is the kitchen the only room with an oven? No, there is also an oven in the bedroom, step 39.
-Is the fridge the only place with food? No, there is also food in the pantry, step 40.

Now tell me whether this happened in the above trajectory (true or false).
-You saw a dishwasher. True, step 0.
-You opened the dishwasher. False.
-You cooked the banana. True, step 33.
-You baked the banana. False.
-You made a smoothie. False.
-You plant the banana peel. False.
-You went north from the corridor. True, step 31.
-You went east from the backyard. False.
-You went south from the corridor. True, steps 22 and 34.
-You went west from the kitchen. True, steps 13, 14, 15, and 16.
-You went west from the pantry. False.