Problem: What are the most important words?
an activist holds a portrait of politician and shouts slogans during a protest near the embassy .
Answer: activist, politician, protest, shout, slogan

Problem: What are the most important words?
castle and church of the town
Answer: castle, church, town

Problem: What are the most important words?
cadets celebrate after graduating at the commencement ceremony for university
Answer:
celebrate, ceremony, university