Input: Identify the most salient words:

the head of author is trapped in a tree

Output: author
head
tree

Input: Identify the most salient words:

A group of horses grazing on grass under a foggy sky.

Output: grass
graze
sky

Input: Identify the most salient words:

colorful lilies growing in a pond reflecting off the glassy surface

Output: grow
pond
surface

Input: Identify the most salient words:

a fireplace with a white mantel and a clock on the top of it

Output:
clock
fireplace
top