Information:  - Salvatore `` Sammy the Bull '' Gravano ( born March 12 , 1945 ) is a former underboss of the Gambino crime family . He is known as the man who helped bring down John Gotti , the family 's boss , by agreeing to become an FBI informant . Originally a mobster for the Colombo crime family , and later for the Brooklyn faction of the Gambinos , Gravano was part of the group that murdered Gambino boss Paul Castellano . Gravano played a key role in planning and executing Castellano 's murder , along with John Gotti , Angelo Ruggiero , Frank DeCicco , and Joseph Armone . After Castellano 's death , Gotti elevated Gravano to underboss , a position he held at the time he became a government witness . At the time , Gravano was the highest - ranking member of the Five Families to break his Cosa Nostra oath and cooperate with the government . His testimony drew a wave of Cosa Nostra members to also become government witnesses .  - Underboss (also capo bastone or sotto capo) is a position within the leadership structure of Sicilian and American Mafia crime families. The underboss is second in command to the boss. The underboss is sometimes a family member, such as a son, who will take over the family if the boss is sick, killed, or imprisoned.  - John Joseph Gotti Jr. (October 27, 1940 ) was an Italian-American gangster who became boss of the Gambino crime family in New York City. Gotti and his brothers grew up in poverty and turned to a life of crime at an early age. Gotti quickly rose to prominence, becoming one of the crime family's biggest earners and a protégé of Gambino family underboss Aniello Dellacroce, operating out of the Ozone Park neighborhood of Queens.  - The Gambino crime family (pronounced ) is one of the "Five Families" that dominates organized crime activities in New York City, United States, within the nationwide criminal phenomenon known as the Mafia (or "Cosa Nostra"). The group, which went through three bosses between 1910 and 1957, is named after Carlo Gambino, boss of the family at the time of the McClellan hearings in 1963, when the structure of organized crime first gained public attention. The group's operations extend from New York and the eastern seaboard to California. Its illicit activities include labor and construction racketeering, gambling, loansharking, extortion, money laundering, prostitution, fraud, hijacking, pier thefts, and fencing.  - Carlo "Don Carlo" Gambino (August 24, 1902  October 15, 1976) was an Italian-born American gangster heavily involved in La Cosa Nostra. Translated as 'this thing of ours', "LCN" is otherwise known as the American Mafia. He is notable for being boss of the Gambino crime family, which is still named after him. After the 1957 Apalachin Convention he unexpectedly seized control of the Commission of the "American Mafia". Gambino was known for being low-key and secretive. In 1937 Gambino was convicted of tax evasion but had his sentence suspended. He lived to the age of 74, when he died of a heart attack in bed "in a state of grace," according to a priest who had given him the Last Rites of the Catholic Church. He had two brothers, Gaspare Gambino, who later married and was never involved with the Mafia and is not to be confused with another Gaspare Gambino who was a mafioso in Palermo, and Paolo Gambino who, on the other hand, had a big role in his brother's family.  - Aniello John "Neil" Dellacroce (March 15, 1914  December 2, 1985), also known as "Mr. Neil," "Father O'Neil" and "The Tall Guy", was an Italian-American gangster and underboss of the Gambino crime family. He rose to the position of underboss when Carlo Gambino moved Joseph Biondo aside. Dellacroce was a mentor to Gambino crime family boss John Gotti.  - A crime family is a unit of an organized crime syndicate, particularly the Mafia (both in Sicily and in the United States), often operating within a specific geographic territory.  - Extortion (also called shakedown, outwrestling, and exaction) is a criminal offense of obtaining money, property, or services from an institution, through coercion. It is sometimes euphemistically referred to as a "protection racket" since the racketeers often phrase their demands as payment for "protection" from (real or hypothetical) threats from unspecified other parties. Extortion is commonly practiced by organized crime groups. The actual obtainment of money or property is not required to commit the offense. Making a threat of violence which refers to a requirement of a payment of money or property to halt future violence is sufficient to commit the offense. Exaction refers not only to extortion or the demanding and obtaining of something through force, but additionally, in its formal definition, means the infliction of something such as pain and suffering or making somebody endure something unpleasant.  - The Five Families refers to the five major New York City organized crime families of the Italian American Mafia. The term was first used in 1931, when Salvatore Maranzano formally organized the previously warring factions into what are now known as the Bonanno, Colombo, Gambino, Genovese, and Lucchese crime families, each with demarcated territory, organizationally structured in a now-familiar hierarchy, and having them reporting up to the same overarching governing entity. Initially (in the summer of 1931), that governing entity was a "capo di tutti capi" (boss of all bosses), but that September the role was replaced by The Commission, which continues to govern American Mafia activities in the United States and Canada.  - Organized crime is a category of transnational, national, or local groupings of highly centralized enterprises run by criminals who intend to engage in illegal activity, most commonly for money and profit. Some criminal organizations, such as terrorist groups, are politically motivated. Sometimes criminal organizations force people to do business with them, such as when a gang extorts money from shopkeepers for so-called "protection". Gangs may become disciplined enough to be considered "organized". A criminal organization or gang can also be referred to as a mafia, mob, or crime syndicate; the network, subculture and community of criminals may be referred to as the underworld.  - Money laundering is the process of transforming the profits of crime and corruption into ostensibly 'legitimate' assets. In a number of legal and regulatory systems, however, the term money laundering has become conflated with other forms of financial and business crime, and is sometimes used more generally to include misuse of the financial system (involving things such as securities, digital currencies, credit cards, and traditional currency), including terrorism financing and evasion of international sanctions. Most anti-money laundering laws openly conflate money laundering (which is concerned with "source" of funds) with terrorism financing (which is concerned with "destination" of funds) when regulating the financial system.  - The American Mafia, often referred to as the Italian Mafia or Italian Mob, (commonly shortened to the Mafia or Mob) and also known as the Italian-American Mafia, La Cosa Nostra (LCN), or the American Cosa Nostra, is an influential, highly organized Italian-American criminal society. The organization is often referred to by members as Cosa Nostra ("our thing"). It originated and developed from the original "Mafia" or "Cosa nostra", the Sicilian Mafia, though eventually encompassing other non-Sicilian Italian-American gangsters and organized crime groups of Italian origin in the United States and, to a lesser extent, Canada. The father of American organized crime is generally considered to be Sicilian-American criminal Charles "Lucky" Luciano.  - The City of New York, often called New York City or simply New York, is the most populous city in the United States. With an estimated 2015 population of 8,550,405 distributed over a land area of just , New York City is also the most densely populated major city in the United States. Located at the southern tip of the state of New York, the city is the center of the New York metropolitan area, one of the most populous urban agglomerations in the world. A global power city, New York City exerts a significant impact upon commerce, finance, media, art, fashion, research, technology, education, and entertainment, its fast pace defining the term "New York minute". Home to the headquarters of the United Nations, New York is an important center for international diplomacy and has been described as the cultural and financial capital of the world.  - A gangster is a criminal who is a member of a gang. Some gangs are considered to be part of organized crime. Gangsters are also called mobsters, a term derived from "mob" and the suffix "-ster". Gangs provide a level of organization and resources that support much larger and more complex criminal transactions than an individual criminal could achieve. Gangsters have been active for many years in countries around the world.    Given the information above, choose from the list below the object entity that exhibits the relation 'occupation' with the subject 'sammy gravano'.  Choices: - criminal  - diplomacy  - fashion  - father  - gangster  - mafioso  - major  - member  - organized crime  - priest  - terrorism
The answer to this question is:
organized crime