Input: Identify the most salient words:

male lion tries to find his way up the tree

Output: find
tree
way

Input: Identify the most salient words:

clouds above sea at twilight

Output: cloud
sea
twilight

Input: Identify the most salient words:

alone elephant from the vast herds grazing in african savannah

Output: elephant
graze
herd

Input: Identify the most salient words:

child feeding a kangaroo in the park

Output:
feed
kangaroo
park