17417
The U.S. , therefore , has a historic opportunity both to strike a blow for human rights in Somalia and to undo the superpower flip - flop of the late 1970s on the Horn of Africa .
 geographical social political: U.S.; geographical social political: Somalia; date: the late 1970s; location: the Horn of Africa
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: U.S., Somalia, the late 1970s, the Horn of Africa 
Answer:
 geographical social political: U.S.; geographical social political: Somalia; date: the late 1970s; location: the Horn of Africa