Input: Identify the most salient words:

a whale breaching off island

Output: breach
island
whale

Input: Identify the most salient words:

streets of the town of a city

Output: city
street
town

Input: Identify the most salient words:

A black and white cat is looking into a toilet.

Output: cat
look
toilet

Input: Identify the most salient words:

tourist attraction is a fortification built by traders for trade in timber and gold

Output:
build
fortification
gold
trade
trader