Input: Identify the most salient words:

steam train winding its way through a wooded valley

Output: valley
way
wind

Input: Identify the most salient words:

biological species is the largest predatory fish in the sea and can grow to feet and live

Output: fish
live
sea

Input: Identify the most salient words:

bring light to the darkness

Output: bring
darkness
light

Input: Identify the most salient words:

aerial footage close to the sunflowers over the field

Output:
field
footage
sunflower