Problem: What are the most important words?
Assorted fruits such as lemons, limes, and oranges.
Answer: fruit, lemon, lime

Problem: What are the most important words?
an empty container ship passing by at sea
Answer: pass, sea, ship

Problem: What are the most important words?
descending view of an illuminated city with skyscrapers at night
Answer:
city, illuminate, skyscraper, view