Problem: What are the most important words?
politician announced wednesday an ambitious plan to make the most sustainable city in the country .
Answer: city, country, politician

Problem: What are the most important words?
add another layer of flavor to your hot chocolate this year with a hint of peppermint .
Answer: add, chocolate, layer

Problem: What are the most important words?
politician addresses the audience as politician looks on during an event declaring
Answer:
address, audience, event, politician