Input: Identify the most salient words:

learn and change the world .

Output: change
learn
world

Input: Identify the most salient words:

winners of contest have been announced

Output: announce
contest
winner

Input: Identify the most salient words:

celebrity wearing a purple evening gown at awards

Output: evening
gown
wear

Input: Identify the most salient words:

calm waters surround a city

Output:
city
surround
water