Problem: What are the most important words?
a ship rusts in the waters off island .
Answer: rust, ship, water

Problem: What are the most important words?
a lone firefighter works hard to extinguish the fire and stop it from spreading more
Answer: fire, firefighter, stop, work

Problem: What are the most important words?
a large airplane that is descending for landing.
Answer:
airplane, descend, landing