7791
They never expected that the luggage carts would in fact make it much easier for customers to find them in sprawling Hong Kong airport and would become an easily recognizable company trademark .
 geographical social political: Hong Kong
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 geographical social political: Hong Kong