Input: Identify the most salient words:

ship in floating dry dock at a shipyard

Output: dock
float
ship
shipyard

Input: Identify the most salient words:

two girls are baking cookies and they have to add frosting to them

Output: add
bake
cookie

Input: Identify the most salient words:

A zebra feasting on lush green grass next to a hillside.

Output: grass
hillside
zebra

Input: Identify the most salient words:

Two airplanes flying over water and passing each other

Output:
airplane
fly
pass