Problem: What are the most important words?
a shop advertises its sale as shoppers buy last minute items before christmas day
Answer: day, item, sale, shop

Problem: What are the most important words?
passengers told media that people fainted during a flight
Answer: flight, passenger, tell

Problem: What are the most important words?
A clock at the top of a tower with a statue in front.
Answer:
clock, statue, tower