Problem: What are the most important words?
smoke from a burning building fills the sky on the outskirts .
Answer: burn, fill, outskirt, sky, smoke

Problem: What are the most important words?
a pizza with toppings on it on a table
Answer: pizza, table, topping

Problem: What are the most important words?
Two dishes of food with a container of dipping sauce.
Answer:
container, food, sauce