Complex sentence: Luigi Giovanni "Baby Shanks" Manocchio is an Italian-American mobster from Providence, Rhode Island who is alleged to be the current boss of the New England based Patriarca crime family of La Cosa Nostra.
Split into simpler sentences: Luigi Giovanni "Baby Shanks" Manocchio is an Italian-American mobster from Providence, Rhode Island. He is alleged to be the current boss of the New England based Patriarca crime family, which is part of a national criminal phenomenon commonly known as the Mafia or La Cosa Nostra.