Problem: What are the most important words?
construction worker smoothing freshly poured concrete at a construction site
Answer: concrete, pour, site, smooth, worker

Problem: What are the most important words?
A full meal including a sandwich, salad, chips, and beverages.
Answer: beverage, meal, salad, sandwich

Problem: What are the most important words?
A dog is helping to herd the sheep for the farmer.
Answer:
farmer, help, herd, sheep