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He also told the British Guardian that he took the three men to Sadr City where his group had interrogated them then executed them , indicating that the members of the Mahdi Army usually demanded a ransom from the families of the hostages in return for freeing their relatives , and would liquidate them anyway after they receive the ransom .
 organization: the British Guardian; cardinal: three; geographical social political: Sadr City; organization: the Mahdi Army
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:
 organization: the British Guardian; cardinal: three; geographical social political: Sadr City; organization: the Mahdi Army