Complex sentence: The 3C's, as it was known in Southie, would quickly become a Winter Hill gangster front and hangout, a place from which the Irish mob ran bookmaking, loan sharking and eventually cocaine.
Split into simpler sentences: The 3C's as it was known in Southie, would quickly become a Winter Hill gangster front and hangout. A place from which the Irish mob ran bookmaking, loan sharking and eventually cocaine.