Input: Identify the most salient words:

man feeding wild pigeons on the street

Output: feed
pigeon
street

Input: Identify the most salient words:

Two trains are side by side on tracks in an empty waiting area.

Output: area
side
track
train

Input: Identify the most salient words:

biological species is a large parrot and is found

Output: find
parrot
specie

Input: Identify the most salient words:

mushrooms for sale in the market

Output:
market
mushroom
sale