Input: Identify the most salient words:

my puppy when i leave for school in the mornings

Output: leave
morning
school

Input: Identify the most salient words:

stands the castle overlooks the city known locally as a city

Output: castle
city
overlook

Input: Identify the most salient words:

a vertical boiler steam train operated by tourist attraction

Output: attraction
operate
train

Input: Identify the most salient words:

Bunk bed with built in desk for the bottom bunk.

Output:
bed
bunk
desk