Input: Identify the most salient words:

fishes hide in caves on the coral reef

Output: fish
hide
reef

Input: Identify the most salient words:

elements always have the same number of protons and electrons .

Output: electron
element
number

Input: Identify the most salient words:

hikers walking up a rocky hill

Output: hiker
hill
walk

Input: Identify the most salient words:

religious leader exchanges gifts with the president of politician during a meeting at his private library .

Output:
exchange
leader
meeting
politician