Input: Identify the most salient words:

On an overcast day a red train sits at the train station.

Output: day
sit
station

Input: Identify the most salient words:

panning over a style villa and its garden with fountain

Output: fountain
garden
villa

Input: Identify the most salient words:

on the grass near the tree stacked firewood

Output: firewood
stack
tree

Input: Identify the most salient words:

A train stopped at the station to pick up passengers.

Output:
passenger
station
stop
train