Problem: What are the most important words?
politician greets a crowd during a visit
Answer: crowd, greet, politician, visit

Problem: What are the most important words?
Group of sheeps and lambs grazing in field near wire fence.
Answer: fence, field, lamb, sheep

Problem: What are the most important words?
A man show a huge doughnut covered with melted chocolate and sprinkles.
Answer:
cover, doughnut, sprinkle