Problem: What are the most important words?
An overhead view shows many busses parked in a lot.
Answer: bus, lot, park, view

Problem: What are the most important words?
man buying fish at a stall on sale at market
Answer: fish, market, sale, stall

Problem: What are the most important words?
A Woman on a motor scooter waiting at an intersection.
Answer:
intersection, scooter, wait