Input: Identify the most salient words:

part of the wall of natural stone beige porous structure .

Output: part
structure
wall

Input: Identify the most salient words:

tourists dining next to boats in the harbor

Output: boat
harbor
tourist

Input: Identify the most salient words:

bales in a field of recently harvested wheat

Output: bale
field
wheat

Input: Identify the most salient words:

happy mother lying on the grass with her little girl in the park on a sunny day

Output:
day
grass
mother