Problem: What are the most important words?
Little by and little girl wearing martial arts gown with yellow belts.
Answer: art, belt, wear

Problem: What are the most important words?
an aircraft moves into position to receive fuel from cargo aircraft during a mission over country .
Answer: aircraft, country, mission, position, receive

Problem: What are the most important words?
A train makes its way across a steel bridge.
Answer:
bridge, train, way