Problem: What are the most important words?
A man plays billiards and aims for the balls.
Answer: aim, ball, billiard

Problem: What are the most important words?
the spire and cathedral from a nearby square on an early autumn afternoon
Answer: afternoon, cathedral, spire

Problem: What are the most important words?
Lived-in living room with two couches and other furniture.
Answer:
furniture, live, room