Input: Identify the most salient words:

mulch made from shredded bark and wood poured from a bag onto the garden

Output: bag
garden
mulch
pour
wood

Input: Identify the most salient words:

A freight train leaving a city during the day

Output: city
day
train

Input: Identify the most salient words:

an airplane is soaring through a sky of clouds

Output: cloud
sky
soar

Input: Identify the most salient words:

construction of the project is beginning to push skyward .

Output:
begin
construction
project