Input: Identify the most salient words:

time lapse shot of shadows moving on a lonely tree

Output: shadow
shot
tree

Input: Identify the most salient words:

a plane at the airport rolling over a highway

Output: airport
highway
roll

Input: Identify the most salient words:

Looking down the track of a train station during the day.

Output: day
station
track

Input: Identify the most salient words:

A kid chases a butterfly.

Output:
butterfly
chase
kid