Input: Identify the most salient words:

tropical storm clouds block out the sun as winds buffet the fronds of a palm tree

Output: block
buffet
cloud
tree
wind

Input: Identify the most salient words:

holes carved in rock and boulders on the summit of hill .

Output: hill
rock
summit

Input: Identify the most salient words:

a train on the electrified railway

Output: electrify
railway
train

Input: Identify the most salient words:

a similar ferry will start carrying passengers

Output:
carry
ferry
passenger