Problem: What are the most important words?
football player smiles at the end of the training session .
Answer: end, player, session

Problem: What are the most important words?
religious leader arrives at the presidential palace of politician and his wife
Answer: leader, politician, wife

Problem: What are the most important words?
This is a hot dog with tomato, mustard, onion, relish, and pickle on it.
Answer:
dog, mustard, onion, relish