Input: Identify the most salient words:

a crocodile rests on green grass

Output: crocodile
grass
rest

Input: Identify the most salient words:

cricketer loses his wicket to cricket player during the fifth test

Output: cricket
lose
player
test
wicket

Input: Identify the most salient words:

railroad track disappearing around a curve

Output: curve
disappear
track

Input: Identify the most salient words:

The direction of the scrolling letters change from bottom to top and now they're in the middle.

Output:
bottom
change
letter
scroll
top