Problem: What are the most important words?
An infant wrapped in a blanket yawns while being held.
Answer: hold, infant, wrap

Problem: What are the most important words?
an astronaut drifting in space is rescued by a space shuttle orbiting earth
Answer: astronaut, earth, rescue, shuttle, space

Problem: What are the most important words?
An airplane and truck are parked at a runway.
Answer:
airplane, park, runway, truck