Input: Identify the most salient words:

a child walks past volunteers greeting arriving migrants and refugees at a train station

Output: arrive
migrant
refugee
station

Input: Identify the most salient words:

boat full with tourist passing under double rainbow on the way to a city

Output: city
rainbow
tourist

Input: Identify the most salient words:

they took a cruise and have info about all the cities they visited

Output: city
cruise
visit

Input: Identify the most salient words:

building and clouds against blue sky seen from a city

Output:
building
city
sky