Problem: What are the most important words?
worshippers circle islamic place of worship as they perform early morning prayers
Answer: place, worship, worshipper

Problem: What are the most important words?
early morning wispy clouds over presidential state with mountain on the horizon
Answer: cloud, mountain, state

Problem: What are the most important words?
a foreign language newscaster is describing some newsworthy event in his own language.
Answer:
describe, event, newscaster