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

Problem: What are the most important words?
turn invention and computer into an arcade and controller
Answer: arcade, invention, turn

Problem: What are the most important words?
An airplane coming in on the runway with mountains behind it
Answer:
airplane, come, runway