Problem: What are the most important words?
The giraffes are bending their necks down to eat from the bush.
Answer: bush, eat, giraffe, neck

Problem: What are the most important words?
plastic blue jetty in the empty sea against blue sky
Answer: jetty, sea, sky

Problem: What are the most important words?
flock of pigeons eating bread outdoors in the city street
Answer:
bread, eat, pigeon, street