Input: Identify the most salient words:

airplane in the sky and cloud at sunrise

Output: airplane
cloud
sunrise

Input: Identify the most salient words:

The skateboarder skated down the street.

Output: skate
skateboarder
street

Input: Identify the most salient words:

road extending into the distance over rolling hills

Output: distance
extend
road

Input: Identify the most salient words:

A very tasty looking pizza with some black burnt spots.

Output:
burn
look
pizza