Input: Identify the most salient words:

the giant mural on the wall of books

Output: book
mural
wall

Input: Identify the most salient words:

rise above the towers of city

Output: city
rise
tower

Input: Identify the most salient words:

hay bales on a field in summer .

Output: bale
field
summer

Input: Identify the most salient words:

People are playing instruments and singing on a stage.

Output:
instrument
singe
stage