Problem: What are the most important words?
colorful sky in lake reflected and the boat in morning time before sunrise
Answer: lake, sunrise, time

Problem: What are the most important words?
In an arena, a matador runs to the side as an angry bull comes out.
Answer: arena, matador, run

Problem: What are the most important words?
lagoon and mangroves on the island
Answer:
island, lagoon, mangrove