Input: Identify the most salient words:

a raven preening his feathers while sitting in the bright sun

Output: feather
preen
sit

Input: Identify the most salient words:

a town an ancient city in the southwest of country hewn from towering walls of rock

Output: country
rock
tower
town
wall

Input: Identify the most salient words:

A small zebra stands next to a feeding station.

Output: stand
station
zebra

Input: Identify the most salient words:

a shopper loads his trunk with groceries at parking lot of supermarket

Output:
grocery
shopper
supermarket