Problem: What are the most important words?
a boy yells to soldiers as their convoy of wheeled vehicles pass through his town .
Answer: soldier, town, vehicle

Problem: What are the most important words?
a lot of modern boats and yachts are moored at a pier of city
Answer: boat, pier, yacht

Problem: What are the most important words?
A male is taking request while playing the instrument.
Answer:
instrument, male, request, take