Input: Identify the most salient words:

A train is carrying a white car off on the tracks.

Output: car
carry
train

Input: Identify the most salient words:

Two elephants eating trees inside of their habitat.

Output: eat
elephant
habitat

Input: Identify the most salient words:

airplane arriving and landing in landscape at sunset with clouds in the sky

Output: cloud
landscape
sky
sunset

Input: Identify the most salient words:

building is in the heart of the city

Output:
building
city
heart