Problem: What are the most important words?
a portrait of a cheetah lying in grass .
Answer: cheetah, grass, lie, portrait

Problem: What are the most important words?
young woman stuffing a pillow case on top of a bed
Answer: bed, case, stuff

Problem: What are the most important words?
A trolley car moves down the tracks in a city.
Answer:
car, city, move, track