Input: Identify the most salient words:

A yellow light rail is going down the track and there are a bunch of wires overhead.

Output: bunch
track
wire

Input: Identify the most salient words:

morning rolling fog over the city at the park in winter

Output: city
fog
winter

Input: Identify the most salient words:

players sing their national anthem prior a match as part .

Output: match
part
sing

Input: Identify the most salient words:

detail over the entrance of the former building .

Output:
building
detail
entrance