Problem: What are the most important words?
Boat that just crossed under a bridge on the waterway of a city.
Answer: bridge, cross, waterway

Problem: What are the most important words?
birch trees in the middle of a meadow in spring
Answer: meadow, spring, tree

Problem: What are the most important words?
inches of snow blanketed a city and the surrounding communities .
Answer:
blanket, city, inch, snow