Input: Identify the most salient words:

train arriving at the station

Output: arrive
station
train

Input: Identify the most salient words:

an airplane is flying past a large city

Output: airplane
city
fly

Input: Identify the most salient words:

A blue and white plane pulls away from a terminal.

Output: plane
pull
terminal

Input: Identify the most salient words:

silhouette of guy and girl walking on the hills .

Output:
hill
silhouette
walk