Problem: What are the most important words?
visiting museum by the world is a book
Answer: book, visit, world

Problem: What are the most important words?
summit is obscured by swirling clouds during this summertime time lapse
Answer: cloud, summit, swirl

Problem: What are the most important words?
A man slaps his friend who is sleeping on a bed to wake him up.
Answer:
friend, slap, wake