Problem: What are the most important words?
firefighters responded friday evening to an explosion at a commercial building .
Answer: building, firefighter, respond

Problem: What are the most important words?
round bales of hay on a golden field with mountains in the distance
Answer: distance, field, mountain

Problem: What are the most important words?
oak trees among brightly colored lichen covered rocks
Answer:
color, cover, oak, rock, tree