Input: Identify the most salient words:

this is a train pulling up to a stop in the city

Output: city
stop
train

Input: Identify the most salient words:

electric locomotive coming out of a tunnel built under a mountain

Output: build
mountain
tunnel

Input: Identify the most salient words:

this style of chair is large enough to only require another sofa in the room

Output: chair
room
sofa
style

Input: Identify the most salient words:

strawberries growing over a pergola

Output:
grow
pergola
strawberry