Problem: What are the most important words?
long scenic road bridge with several lanes with raised sections and fencing in wide mouth
Answer: bridge, fence, lane, mouth, section

Problem: What are the most important words?
small pond with pretty yellow flowering water lilies and green lily pads floating on the surface of the water
Answer: float, pond, surface

Problem: What are the most important words?
hand of a man working at computer typing on a keyboard on dark desktop .
Answer:
computer, hand, keyboard, work