Input: Identify the most salient words:

a packed ferry coming in to the quay

Output: come
ferry
quay

Input: Identify the most salient words:

herd of sheep on a pasture .

Output: herd
pasture
sheep

Input: Identify the most salient words:

Someone turns around to catch his breath.

Output: breath
catch
turn

Input: Identify the most salient words:

shot of a surgeon looking at a monitor in an operating room

Output:
look
monitor
room