Input: Identify the most salient words:

airplane approaching the airport and landing in a bright sky

Output: airplane
airport
approach
landing

Input: Identify the most salient words:

A white refrigerator has a freezer on top and cooler on the bottom.

Output: bottom
refrigerator
top

Input: Identify the most salient words:

ideas for joining chairs into a bench .

Output: bench
chair
idea

Input: Identify the most salient words:

A ram and two sheep in a misty pasture.

Output:
pasture
ram
sheep