Input: Identify the most salient words:

a colorful sky as clouds roll over the mountains at sunrise

Output: cloud
mountain
roll
sky

Input: Identify the most salient words:

the trees and undergrowth in an eastern deciduous forest in early spring .

Output: forest
spring
tree

Input: Identify the most salient words:

elementary school students work at desks that appear to be decades old .

Output: appear
student
work

Input: Identify the most salient words:

fishing boats harbor under a clear blue sky

Output:
boat
harbor
sky