Problem: What are the most important words?
waterfalls flowing in idyllic uncontaminated environment crossing green meadows and boulders in summer
Answer: boulder, environment, flow, meadow, waterfall

Problem: What are the most important words?
a student asks their question during website category to a champ .
Answer: category, champ, student

Problem: What are the most important words?
The bathroom is brightly lit by sunlight from the window.
Answer:
bathroom, sunlight, window