Problem: What are the most important words?
a climber scales a sea cave
Answer: cave, climber, scale

Problem: What are the most important words?
A stuffed bear next to a toothbrush, a book and a small sheriff's badge.
Answer: badge, bear, book, toothbrush

Problem: What are the most important words?
art gallery which includes interior views and art as well as a small group of people
Answer:
art, gallery, include, view