Input: Identify the most salient words:

A train pulling out of a train station next to train tracks.

Output: pull
station
track
train

Input: Identify the most salient words:

A line of hikers trek across the rocky, sandy soil toward the summit on a hazy day.

Output: hiker
soil
summit
trek

Input: Identify the most salient words:

statue of an angel standing on the bridge leading

Output: angel
stand
statue

Input: Identify the most salient words:

earth rising above the surface of the moon digital composite

Output:
earth
rise
surface