Question:  Roy Black is a civil and criminal defense trial attorney who has represented an American financier and registered sex offender who served how many months in prision for his conviction of soliciting an underage girl for prostitution?
Related documents: [0]  [DOC] Roy Black (born February 17, 1945 in New York City) is a civil and criminal defense trial attorney. He is best known for his gaining an acquittal, in 1991, of William Kennedy Smith on charges of rape and for his representation of conservative radio commentator Rush Limbaugh. Other celebrities whom Black has represented include actor Kelsey Grammer, racer Hélio Castroneves, "Girls Gone Wild" creator Joe Francis, artist Peter Max, billionaire Jeffrey Epstein, and Justin Bieber. Black is also informally referred to by his nickname, "The Professor." [END] 
[1]  [DOC] Jeffrey Edward Epstein (born January 20, 1953) is an American financier and registered sex offender in the United States. He worked at Bear Stearns early in his career and then formed his own firm, J. Epstein & Co. In 2008, Epstein was convicted of soliciting an underage girl for prostitution, for which he served 13 months in prison. He lives in the US Virgin Islands. [END] 
Answer: 
13 months
13 months