Problem: What are the most important words?
bed winding with trees on either side of the banks
Answer: bank, bed, side

Problem: What are the most important words?
Passengers are getting ready to board a ship.
Answer: board, passenger, ship

Problem: What are the most important words?
The crane lifts the crate, which is stamped karaboudjan, onto a cargo ship baring the same name.
Answer:
bare, crane, crate, lift, ship