Input: Identify the most salient words:

A clock and various arrival and departure times at a station.

Output: arrival
clock
time

Input: Identify the most salient words:

clouds have tightened the sky in a desert

Output: cloud
desert
sky

Input: Identify the most salient words:

transform an old dresser by adding feet and painting

Output: add
painting
transform

Input: Identify the most salient words:

Someone is placing a tape like substance on a tire, then runs a tool across the tape.

Output:
place
tape
tire
tool