Input: Identify the most salient words:

cities then and now in the late th century country announced a major economic development project .

Output: announce
city
country

Input: Identify the most salient words:

vinyl siding being installed on a new home under construction

Output: home
instal
side
vinyl

Input: Identify the most salient words:

ferns growing at the base of a tree in a woodland

Output: fern
grow
tree

Input: Identify the most salient words:

A silver four propeller air plane taxis down a runway at an airport.

Output:
airport
runway
taxis