Input: Identify the most salient words:

close up of leafs from a chinese elm as bonsai tree

Output: close
elm
leafs

Input: Identify the most salient words:

many of the more recent walls and fortifications of the old town have been nicely restored .

Output: fortification
restore
town
wall

Input: Identify the most salient words:

flying above the fog during sunrise

Output: fly
fog
sunrise

Input: Identify the most salient words:

one of the great bridges leading into a long tunnel on the trail .

Output:
lead
trail
tunnel