Problem: What are the most important words?
the wave breaks about stones lying near to coast
Answer: break, stone, wave

Problem: What are the most important words?
A plate contains beef with a side of broccoli.
Answer: beef, broccoli, contain

Problem: What are the most important words?
wild west and congress of rough riders of the world a congress of ethnicity in fiction .
Answer:
ethnicity, fiction, world