Input: Identify the most salient words:

low tide at the beach in a city

Output: beach
city
tide

Input: Identify the most salient words:

biological species and flower lanterns floating on the pond .

Output: float
pond
specie

Input: Identify the most salient words:

nurses on duty in the hospital

Output: duty
hospital
nurse

Input: Identify the most salient words:

a train snaking its way through a pair of tight curves on elevated tracks

Output:
snake
train
way