Input: Identify the most salient words:

a mama and a baby elephant walking around their pen

Output: elephant
pen
walk

Input: Identify the most salient words:

espresso flowing from a machine into a cup

Output: cup
espresso
machine

Input: Identify the most salient words:

natural pools are a swimming pool and pond combined that require no chemicals and very little maintenance .

Output: maintenance
pond
pool

Input: Identify the most salient words:

A dog navigates an obstacle.

Output:
dog
navigate
obstacle