Problem: What are the most important words?
two blue trains traveling down train tracks next to a stone wall.
Answer: track, train, travel, wall

Problem: What are the most important words?
A pitch is delivered as the batter, catcher, and umpire watch.
Answer: batter, catcher, pitch

Problem: What are the most important words?
An airplane parked at its terminal at the airport
Answer:
airplane, airport, terminal