Problem: What are the most important words?
A youth begins to play a harmonious tune with a trumpet.
Answer: begin, trumpet, tune

Problem: What are the most important words?
cyclists racing along the road .
Answer: cyclist, race, road

Problem: What are the most important words?
silhouette of a man with a light bulb on is head to illustrate the concept of having and idea
Answer:
concept, head, silhouette