Problem: What are the most important words?
boats moored in a marina
Answer: boat, marina, moor

Problem: What are the most important words?
She leaves the confessional and rushes past a pew, knocking a Bible from the seat.
Answer: confessional, knock, leave, rush, seat

Problem: What are the most important words?
A freight train travelling at dusk with lights on.
Answer:
dusk, light, train