Input: Identify the most salient words:

People gathered at the edge of a luggage carousel at the airport

Output: airport
carousel
gather

Input: Identify the most salient words:

apply light gradient to the sky

Output: apply
gradient
sky

Input: Identify the most salient words:

helicopter flying against a cloudy sun

Output: fly
helicopter
sun

Input: Identify the most salient words:

Ending the call, someone smiles down at her again.

Output:
call
end
smile