5315
And the U.S. government , can withhold the names of people detained as part of the 9 / 11 investigation .
 geographical social political: U.S.; event: 9 / 11
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: U.S.; event: 9 / 11