Problem: What are the most important words?
A pizza on the top rack of an oven.
Answer: oven, pizza, rack

Problem: What are the most important words?
fishermen hauling boat up the beach at coast
Answer: beach, boat, fisherman, haul

Problem: What are the most important words?
this tiger belonging appears to have been immobilized by running over a mine .
Answer:
appear, belong, immobilize, mine, run