Input: Identify the most salient words:

this is the first image ever taken from another planet that actually shows our home as a planetary disk

Output: image
planet
take

Input: Identify the most salient words:

mountains with agave and sea on the island

Output: island
mountain
sea

Input: Identify the most salient words:

the bay bridge silhouetted against a clear sky just before sunrise

Output: bridge
sky
sunrise

Input: Identify the most salient words:

Plane getting ready for takeoff on the runway at airport.

Output:
plane
runway
takeoff