Input: Identify the most salient words:

The meal is next to a piece of toasted bread.

Output: bread
meal
piece

Input: Identify the most salient words:

mountain goat leaping from rock to another against blue sky

Output: goat
leap
rock

Input: Identify the most salient words:

collection of shells collected in the sea for collectors

Output: collect
collection
collector
sea
shell

Input: Identify the most salient words:

commuters travelling up and down the escalators at an underground station

Output:
commuter
escalator
travel