Problem: What are the most important words?
football coach reacts to a non call during the first quarter against american football team .
Answer: call, coach, quarter

Problem: What are the most important words?
bright green algae grows in a tidal pool along the coast .
Answer: algae, grow, pool

Problem: What are the most important words?
a city is a northern city and municipality in the district
Answer:
city, district, municipality