Problem: What are the most important words?
early morning in a mountain valley with green meadow and colorful clouds in beautiful light of sunrise
Answer: morning, sunrise, valley

Problem: What are the most important words?
things that you should know before hiring cars for wedding ceremony
Answer: car, hire, know

Problem: What are the most important words?
security guards protecting military commander check out a crowd before his arrival at the annual
Answer:
arrival, commander, crowd