Input: Identify the most salient words:

walkers approaching the point on the summit

Output: approach
summit
walker

Input: Identify the most salient words:

close up of a crocodile lurking in water

Output: crocodile
lurk
water

Input: Identify the most salient words:

teenager in his room a portrait with your dog

Output: dog
portrait
teenager

Input: Identify the most salient words:

an engraving entitled scanned at high resolution from a book published

Output:
engrave
entitle
publish
resolution
scan