Input: Identify the most salient words:

site listing category in front

Output: category
list
site

Input: Identify the most salient words:

volunteers sort and put books on shelves

Output: book
shelf
sort

Input: Identify the most salient words:

a caucasian boy hidden behind a globe reveals only the eyes and part of the face

Output: eye
face
hide
part
reveal

Input: Identify the most salient words:

small rock pool on a pebbly beach surrounded by green seaweed

Output:
pool
seaweed
surround