Complex sentence: He was accused of being one of the men behind the Portella della Ginestra massacre, when 11 persons were killed and 33 wounded during May Day celebrations in Sicily on May 1,1947, perpetrated by the the bandit Salvatore Giuliano and possibly backed by the Mafia.
Split into simpler sentences: He was accused of being one of the men behind the Portella della Ginestra massacre, when 11 persons were killed and 33 wounded during May Day celebrations in Sicily on May 1,1947. The bloodbath was perpetrated by the the bandit Salvatore Giuliano who was possibly backed by the Mafia.