Input: Identify the most salient words:

teenage girl studying at a desk in a school classroom .

Output: classroom
desk
study

Input: Identify the most salient words:

a trainman switching the tracks for the train

Output: switch
track
train

Input: Identify the most salient words:

river flows through national park past the town on a hazy summer

Output: flow
park
river
town

Input: Identify the most salient words:

This is an image of two planes at the airport.

Output:
airport
image
plane