Input: Identify the most salient words:

a soldier checks a car entering a city .

Output: car
check
city
soldier

Input: Identify the most salient words:

A young boy pulls the other's boot and helps him get it on.

Output: boot
help
pull

Input: Identify the most salient words:

orchids with white flowers growing on a big tree by a lake .

Output: flower
orchid
tree

Input: Identify the most salient words:

politician gives politician a tour of the grounds during his visit .

Output:
give
politician
tour