Problem: What are the most important words?
time lapse of moving clouds over the church .
Answer: church, cloud, move

Problem: What are the most important words?
bow end of ship type
Answer: bow, end, type

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