Problem: What are the most important words?
a snail sheltering under a leaf to protect from the rain
Answer: leaf, rain, snail

Problem: What are the most important words?
Five people in walking in an alley near a rickshaw with a cat sleeping on it.
Answer: rickshaw, sleep, walk

Problem: What are the most important words?
coach the coach speaks to rugby player during a training session .
Answer:
coach, player, rugby