Problem: What are the most important words?
sea cave with rust and black colored rocks and boat in the middle .
Answer: boat, middle, sea

Problem: What are the most important words?
private university attracts international students from all over the world
Answer: student, university, world

Problem: What are the most important words?
Large old fashioned bathtub with towel hanging on it.
Answer:
bathtub, hang, towel