Input: Identify the most salient words:

Train comes down tracks in front of old castle.

Output: come
front
track
train

Input: Identify the most salient words:

Three people ski down a mountain at a ski resort.

Output: mountain
resort
ski

Input: Identify the most salient words:

shot of tour boat as it passes under a bridge

Output: boat
bridge
pass
shot

Input: Identify the most salient words:

living and working on a cattle and horse ranch in the deep south .

Output:
live
south
work