Input: Identify the most salient words:

books for sale in a street

Output: book
sale
street

Input: Identify the most salient words:

tourists and locals visit the village at park during christmas time

Output: tourist
village
visit

Input: Identify the most salient words:

Several zebras are seen roaming through the field.

Output: field
roam
zebra

Input: Identify the most salient words:

firefighters battle a blaze in a commercial building

Output:
battle
building
firefighter