Input: Identify the most salient words:

work has been completed on the second phase of stage

Output: complete
phase
work

Input: Identify the most salient words:

ship steams in formation during the rim

Output: formation
rim
steam

Input: Identify the most salient words:

Two zebras wander around in a grassy field.

Output: field
wander
zebra

Input: Identify the most salient words:

site listing category is built

Output:
build
category
list