Input: Identify the most salient words:

A girl posing at a zoo by an elephant and its keeper

Output: elephant
keeper
zoo

Input: Identify the most salient words:

passenger airplane passing by among cumulus clouds high in the sky at daytime .

Output: cloud
daytime
pass
sky

Input: Identify the most salient words:

images from one of the rooms in apartment show a large grand piano

Output: image
piano
room

Input: Identify the most salient words:

A giraffe leaning it's long neck over the fence to eat leaves off a bush.

Output:
bush
eat
giraffe
leave