Input: Identify the most salient words:

continent from orbit in space just as the sun rises .

Output: orbit
space
sun

Input: Identify the most salient words:

boxer fights boxer in the sixth round

Output: boxer
fight
round

Input: Identify the most salient words:

a number of items laying on a surface near one another

Output: item
lay
surface

Input: Identify the most salient words:

A cat attacking a bird on the sidewalk.

Output:
attack
bird
cat
sidewalk