Input: Identify the most salient words:

cargo ships in the sea on horizon

Output: horizon
sea
ship

Input: Identify the most salient words:

A giraffe feeding on hay in it's enclosure

Output: feed
giraffe
hay

Input: Identify the most salient words:

woman walks on a bridge in the city

Output: bridge
city
walk

Input: Identify the most salient words:

People sitting at a desk and laughing.

Output:
desk
laughing
sit