Problem: What are the most important words?
coloured headbands for hair and flowers to decorate the hairstyle for little girl
Answer: colour, decorate, flower, hair, hairstyle

Problem: What are the most important words?
a runner is helped across the finish line during event
Answer: event, help, line, runner

Problem: What are the most important words?
politician delivers a speech during an event
Answer:
deliver, event, politician