Input: Identify the most salient words:

museum the first residential building and the only wooden structure remaining

Output: building
remain
structure

Input: Identify the most salient words:

A man is flying an airplane or helicopter near a mountain.

Output: airplane
fly
helicopter

Input: Identify the most salient words:

model of the first satellite put into space by mankind

Output: model
satellite
space

Input: Identify the most salient words:

A meal consisting of a bowl of soup, a sandwich, vegetables and crackers.

Output:
consist
meal
sandwich
soup