Problem: What are the most important words?
Shrimp, broccoli, carrots, shrimp and cheese are being cooked in a skillet.
Answer: cheese, shrimp, skillet

Problem: What are the most important words?
lapse of fog and clouds rolling over the mountain green hills
Answer: cloud, fog, hill, lapse, roll

Problem: What are the most important words?
police have established a crime scene at a home .
Answer:
establish, home, police, scene