Input: Identify the most salient words:

earth from space showing continent .

Output: continent
earth
space

Input: Identify the most salient words:

come along with us to poster found in the collection

Output: collection
find
poster

Input: Identify the most salient words:

A man uses a trailer to dump something out and then drives off.

Output: drive
dump
trailer

Input: Identify the most salient words:

image titled understand the game of sport

Output:
game
image
sport