Input: Identify the most salient words:

An old train looks happy while coming down the tracks.

Output: come
look
train

Input: Identify the most salient words:

football coach sends off man during the match .

Output: coach
match
send

Input: Identify the most salient words:

many clues about the origin may be gained by studying the moon .

Output: clue
moon
origin

Input: Identify the most salient words:

politician delivers the state of the speech .

Output:
deliver
politician
state