Input: Identify the most salient words:

An old steam engine has black smoke coming from it.

Output: come
engine
smoke

Input: Identify the most salient words:

brake and release valve fitted to the side of the vehicle for convenient operation

Output: fit
side
vehicle

Input: Identify the most salient words:

Delta airlines passenger jet in flight, landing gears down, blue skies partly cloudy.

Output: flight
gear
jet
land

Input: Identify the most salient words:

4 skiers on a mountainside prepared to ski the expert course.

Output:
course
prepare
ski
skier