Input: Identify the most salient words:

material is unloaded at the north end of the building using an overhead crane when needed .

Output: crane
material
unload

Input: Identify the most salient words:

get the recipe for ingredient and type of dish

Output: dish
ingredient
recipe

Input: Identify the most salient words:

multiple crews are fighting a large fire .

Output: crew
fight
fire

Input: Identify the most salient words:

A herd of cattle wait to drink at the trough.

Output:
cattle
trough
wait