Input: Identify the most salient words:

elephant near the sea with a boat at the bottom

Output: boat
elephant
sea

Input: Identify the most salient words:

sunlight breaking through cloud on the waters in winter

Output: break
cloud
sunlight
water

Input: Identify the most salient words:

flying fluff in the city at evening

Output: city
evening
fly

Input: Identify the most salient words:

green fern on a tree in the rain forest

Output:
fern
forest
tree