Input: Identify the most salient words:

a train being operated on a train track

Output: operate
track
train

Input: Identify the most salient words:

There is a painting by the fireplace in the living room.

Output: fireplace
painting
room

Input: Identify the most salient words:

this train is carrying its cars over the rails

Output: car
rail
train

Input: Identify the most salient words:

low section portrait of group of friends playing soccer on the beach .

Output:
beach
friend
soccer