Problem: What are the most important words?
tourists on the bow of a ship being pulled by tug through tourist attraction
Answer: attraction, pull, ship

Problem: What are the most important words?
airship over the warships on the way to tourist attraction rare
Answer: attraction, warship, way

Problem: What are the most important words?
waterfalls flowing through the jungle in high definition footage with ambient audio
Answer:
flow, jungle, waterfall