Problem: What are the most important words?
graduates receive their diplomas during the graduation on friday morning .
Answer: diploma, graduate, graduation, receive

Problem: What are the most important words?
person has donated inches of her own hair to a charity that creates wigs for children with cancer
Answer: cancer, donate, hair, wig

Problem: What are the most important words?
mri scan of the head showing the brain highlighted in green
Answer:
brain, head, highlight