Input: Identify the most salient words:

A herd of elephants and their calves walking single file

Output: calf
elephant
herd

Input: Identify the most salient words:

The tops of village buildings are shown on a hillside.

Output: building
hillside
top

Input: Identify the most salient words:

A zebra leans down to eat hay off the ground.

Output: ground
hay
zebra

Input: Identify the most salient words:

great egret looks on as another comes in for a landing .

Output:
come
egret
landing