Input: Identify the most salient words:

railways class locomotive and train in the renovated station

Output: locomotive
station
train

Input: Identify the most salient words:

map showing location of a city

Output: city
location
map

Input: Identify the most salient words:

a airplane that is parked on a runway with people loading in it.

Output: airplane
load
park

Input: Identify the most salient words:

a shopper loads his trunk with groceries at parking lot of supermarket

Output:
grocery
shopper
supermarket