Input: Identify the most salient words:

protected site in the desert

Output: desert
protect
site

Input: Identify the most salient words:

rock formation caused by erosion and known as tourist attraction

Output: attraction
cause
erosion

Input: Identify the most salient words:

A boy in a yellow shirt is eating pizza.

Output: eat
pizza
shirt

Input: Identify the most salient words:

the silhouette of the statue under the pale light of a full moon partially hidden by dark clouds

Output:
cloud
moon
silhouette