Question: What was the name of the Mafia faction headed by the person responsible for the assassination of Placido Rizzotto?

Context paragraphs:
Wells (name): Wells is a surname of English origin, but is occasionally used as a given name too.  It derives from occupation, location, and topography.  The occupational name (i.e. "Wellman") derives from the person responsible for a village's spring.  The locational name (i.e. "Well") derives from the pre-7th century "waella" ("spring").  The topographical name (i.e. "Attewell") derives from living near a spring.  The oldest public record is found in 1177 in the county of Norfolk.  Variations of Wells include Well, Welman, Welles, Wellman and Wellsman.  At the time of the British Census of 1881 Wells Surname at Forebears, its relative frequency was highest in Berkshire (3.2 times the British average), followed by Leicestershire, Oxfordshire, Kinross-shire, Huntingdonshire, Kent, Sussex, Lincolnshire, Dumfriesshire and Bedfordshire.  People with the name include:

Information officer: Information officer is the title of the role assigned to the person responsible for encouraging responsible persons to comply with the principles and conditions for the lawful processing of personal information.  The title "information officer" is synonymous with that of "data protection officer", as established in terms of the General Data Protection Regulation (GDPR).  However, the role of information officer or data protection officer is not the same as that of chief privacy officer in the United States.

El Zorro (wrestler): Jesús Cristóbal Martínez Rodriguez (born July 25, 1975) is a Mexican "luchador" (professional wrestler) who is best known as El Zorro.  His gimmick started out very similar to the fictional character Zorro complete with mask, but in recent years it has evolved and the mask has been eliminated.  He is best known for his work in the Lucha Libre AAA Worldwide (AAA) promotion in Mexico, where he is a former AAA Mega Champion.  He has in the past worked both in Europe, Japan and made a few brief appearances for the World Wrestling Federation show WWF Super Astros.  He was the "Deputy leader" of the "La Legión Extranjera" faction headed by Konnan.  In December 2012, Martínez was repackaged as La Parka Negra, the storyline nemesis of La Parka.  He returned as El Zorro in October 2013, before departing the company in February 2017.

Luciano Leggio: Luciano Leggio (] ; 6 January 1925 – 15 November 1993) was an Italian criminal and leading figure of the Sicilian Mafia.  He was the head of the Corleonesi, the Mafia faction that originated in the town of Corleone.  He's universally known with the surname Liggio, a result of a misspelling in court documents in the 1960s.

Qualified Person for Pharmacovigilance: A Qualified Person Responsible for Pharmacovigilance, or QPPV, is an individual named by a pharmaceutical company as the main person responsible for ensuring that the company (the product's Marketing Authorisation Holder or MAH) meets its legal obligations for the monitoring of the safety of a medicinal product on the market.

Placido Rizzotto: Placido Rizzotto (Corleone, January 2, 1914 – March 10, 1948) was an Italian socialist peasant and trade union leader from Corleone, who was assassinated by Sicilian Mafia boss Luciano Leggio.  Pieces of Rizzotto's mutilated body were discovered two years later at the bottom of a cliff with his limbs chained up, and a bullet hole in his head.  When he was killed, Rizzotto was doing activist work with farm laborers, trying to help them take over unfarmed land on large estates in the area.

Sriranga II: Sriranga II (a.k.a.Sriranga Chika Raya) (r. 1614 CE) was nominated in 1614 by King Venkata II to succeed him as king of the Vijayanagara Empire in Southern India.  Sriranga was supported by a faction headed by Yachama Naidu of Recherla Velama dynasty, one of the Venkata II's loyal viceroys and commanders and Nayak of Venkatagiri, but was not favored by a set of nobles headed by Gobburi Jagga Raya, brother (or father) of Venkata II’s favourite Queen Obayamma.

Bernardo Provenzano: Bernardo Provenzano (] ; 31 January 1933 – 13 July 2016) was a member of the Sicilian Mafia ("Cosa Nostra") and was suspected of having been the head of the Corleonesi, a Mafia faction that originated in the town of Corleone, and de facto "capo di tutti capi" (boss of all bosses) of the entire Sicilian Mafia until his arrest in 2006.

Executive officer: An executive officer (XO) is generally a person responsible for running an organization, although the exact nature of the role varies depending on the organization.  In many militaries, an executive officer is the second-in-command, reporting to the commanding officer.  The XO is typically responsible for the management of day-to-day activities, freeing the commander to concentrate on strategy and planning the unit's next move.

San Jose Maverick: San Jose Maverick (later "Maverick") was an underground newspaper published in San Jose, California monthly from Feb. 1969 to Fall 1970.  A total of 16 issues were published, in a tabloid format.  Connected with the Bay Area Revolutionary Union and its local faction headed by Stanford University English professor H. Bruce Franklin, the Maverick was labor-oriented, and printed some articles in Spanish.  Bruce Franklin contributed a number of articles under the pseudonym "Will B. Outlaw", including one entitled "The AK-47 vs. the M-16: Why the Capitalist Gun Is Inferior".  In its second year of publication the paper shortened its title to "Maverick" starting with the Feb. 1970 issue (vol.  2, no. 2).

Supporting paragraphs: Placido Rizzotto Luciano Leggio
Answer: Corleonesi