Problem: What are the most important words?
supermodel made history when she became the first model to appear on the cover of magazine .
Answer: appear, cover, magazine, model

Problem: What are the most important words?
politician reacted with a laugh when a supporter talked
Answer: politician, react, supporter

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, fuel, mission, move, receive