Problem: What are the most important words?
solar panel in the city on the blue sky and tree
Answer: city, sky, tree

Problem: What are the most important words?
young fans participate in activities during the open training session and fan day .
Answer: activity, participate, session

Problem: What are the most important words?
A giraffe leaning it's long neck over the fence to eat leaves off a bush.
Answer:
bush, fence, giraffe, neck