context: William Stanley Milligan (English: William Stanley Milligan), known as Billy Milligan (English: Billy Milligan; February 14, 1955, Miami Beach - December 12, 2014, Columbus [1]) is an American citizen, one of the most famous people with a diagnosis of " multiple personality ”in the history of psychiatry. Milligan’s personality splits totaled 24 full-fledged personalities, of which 10 were the main ones: Milligan himself (as the main personality), Arthur Smith, Reagen Wadaskovinich, Allen, Tommy, David, Christine, Christopher, Adalan and Danny.
question: How many personalities did Billy Milligan have?
answers.text: 24