Problem: What are the most important words?
A woman is walking beside a subway restaurant during her lunch.
Answer: lunch, restaurant, walk

Problem: What are the most important words?
A zebra wagging its tail as it eats some grass on the ground.
Answer: grass, wag, zebra

Problem: What are the most important words?
stained glass window with religious scene showing builder carring the cross
Answer:
builder, scene, stain, window