Input: Identify the most salient words:

An elephant in its pen sticking its trunk outside.

Output: elephant
pen
trunk

Input: Identify the most salient words:

teacher helping a young student with math

Output: math
student
teacher

Input: Identify the most salient words:

a gravel road in summer leads over forested hills

Output: lead
road
summer

Input: Identify the most salient words:

roosters and chickens graze in the yard

Output:
chicken
rooster
yard