Problem: What are the most important words?
seamless pattern with autumn leaves and twigs curled into a wreath
Answer: leave, pattern, wreath

Problem: What are the most important words?
slow pan of boats in a harbor at sunrise
Answer: boat, harbor, sunrise

Problem: What are the most important words?
smart new tower block of flats with trees seen through the windows at night
Answer:
block, flat, night, window