Problem: What are the most important words?
a ferry docked at a jetty to load passengers to cross bay
Answer: bay, dock, jetty, load, passenger

Problem: What are the most important words?
aerial shot of clouds in the morning with rain below
Answer: cloud, morning, shot

Problem: What are the most important words?
actor and his wife attend the premiere for the film on the sixth day of festival
Answer:
day, festival, premiere, wife