Problem: What are the most important words?
model in tiered gold embroidered evening gown
Answer: evening, gown, model

Problem: What are the most important words?
soldiers stand guard near the site where an explosion went off .
Answer: guard, site, soldier

Problem: What are the most important words?
The man is doing some exercises as he bends his legs while on the ground.
Answer:
bend, exercise, ground, leg