Input: Identify the most salient words:

A large clock tower with two clocks mounted on it's sides.

Output: mount
side
tower

Input: Identify the most salient words:

doctors walk down the halls of a hospital

Output: doctor
hospital
walk

Input: Identify the most salient words:

A delicious looking Italian cheese dish, possibly pizza.

Output: dish
look
pizza

Input: Identify the most salient words:

People are waiting to check in for their flights.

Output:
check
flight
wait