Input: Identify the most salient words:

crop dusting helicopter taking off from refilling for another flight

Output: flight
helicopter
take

Input: Identify the most salient words:

Three microwaves two stacked one separate beginning to catch fire

Output: catch
fire
microwave

Input: Identify the most salient words:

explore the several local theme parks and attractions

Output: attraction
explore
park

Input: Identify the most salient words:

pitch your tent in a field of llamas .

Output:
field
pitch
tent