Question: What college did the author of Excellent Cadavers attend?

full_context: Document 1: Equal Danger: Equal Danger (Italian title: "Il contesto") is a 1971 detective novel by Leonardo Sciascia where a police inspector investigating a string of murders finds himself involved in existential political intrigues. Set in an indeterminate country this novel is informed by the corrupt politics and the Mafia of Sciascia's experiences in 1970s Sicily.
Document 2: Arnaldo Momigliano: Momigliano was born on 5 September 1908 in Caraglio, Piedmont. In 1936 he became Professor of Roman history at the University of Turin, but as a Jew soon lost his position due to the anti-Jewish Racial Laws enacted by the Fascist regime in 1938, and moved to England, where he remained. After a time at Oxford University, he went to University College London, where he was Professor from 1951 to 1975. Momigliano visited regularly at the University of Chicago where he was named Alexander White Professor in the Humanities, and at the Scuola Normale Superiore di Pisa. He wrote reviews for "The New York Review of Books" In addition to studying the ancient Greek historians and their methods, he also took an interest in modern historians, such as Edward Gibbon, and wrote a number of studies of them.
Document 3: Excellent Cadavers: Excellent Cadavers is a 1995 non-fiction book by American author Alexander Stille about the Sicilian Mafia, concentrating on magistrate Giovanni Falcone's fight against the Mafia and his 1992 assassination.
Document 4: The Godfather (novel): The Godfather is a crime novel written by Italian American author Mario Puzo. Originally published in 1969 by G.P. Putnam's Sons, the novel details the story of a fictional Mafia family based in New York City (and Long Beach, New York), headed by Vito Corleone. The novel covers the years 1945 to 1955, and also provides the back story of Vito Corleone from early childhood to adulthood.
Document 5: Daniele Mastrogiacomo: Daniele Mastrogiacomo (born on 30 September 1954, Karachi, Pakistan) is an Italian-Swiss journalist and a war correspondent for "la Repubblica" newspaper.
Document 6: Maurizio Di Gati: Di Gati was born in Racalmuto, in the province of Agrigento, the hometown of the famous Sicilian writer Leonardo Sciascia. He became a barber. However, when in 1991 his elder brother Diego Di Gati was killed in a vendetta with a rival mafia-like group, the Stidda, he decided to become a 'man of honour' to avenge his brother.
Document 7: Adel al-Zubeidi: He was killed on November 8, 2005, by three gunmen driving in either an Opel or a "government vehicle" outside Adil, a Sunni neighbourhood of Baghdad. He was traveling with Thamer Hamoud al-Khuzaie, another lawyer associated with the trials who was wounded in the attack. The day before, he had predicted he would be murdered.
Document 8: Federal Bureau of Investigation: In 2005, fugitive Puerto Rican Nationalist leader Filiberto Ojeda Ríos died in a gun battle with FBI agents in 2005 in what some charged was an assassination.[citation needed] Puerto Rico Governor Aníbal Acevedo Vilá criticized the FBI assault as "improper" and "highly irregular" and demanded to know why his government was not informed of it. The FBI refused to release information beyond the official press release, citing security and agent privacy issues. The Puerto Rico Justice Department filed suit in federal court against the FBI and the US Attorney General, demanding information crucial to the Commonwealth's own investigation of the incident. The case was dismissed by the U.S Supreme Court. Ojeda Rios' funeral was attended by a long list of dignitaries, including the highest authority of the Roman Catholic Church in Puerto Rico, Archbishop Roberto Octavio González Nieves, ex-Governor Rafael Hernández Colón, and numerous other personalities.
Document 9: John Elkann: Born in New York City, John Elkann is the first son of Alain Elkann, a New York-born journalist and writer of French Jewish and Italian Jewish background, and his then wife Italian Margherita Agnelli. His parents divorced in 1981 and both have remarried. Elkann's maternal grandparents were the industrialist Gianni Agnelli and the Italian socialite Marella Agnelli (born Donna Marella Caracciolo di Castagneto). His paternal great-grand-uncle was the banker Ettore Ovazza.
Document 10: Under and Alone: Under and Alone is a book written by undercover ATF agent William Queen and published by Random House in 2005 which chronicles his infiltration of the violent outlaw motorcycle gang, the Mongols.
Document 11: Alexander Stille: Alexander Stille (born 1 January 1957 in New York City) is an American author and journalist. He is the son of Ugo Stille, a well-known Italian journalist and a former editor of Italy's Milan-based Corriere della Sera newspaper. Alexander Stille graduated from Yale and later the Columbia University Graduate School of Journalism. He has written many articles on the subject of Italy, in particular its politics and the Mafia.
Document 12: Sergio Romano (writer): Sergio Romano (born 7 July 1929) is an Italian writer, journalist, and historian. He is a columnist for the newspaper "Corriere della Sera". Romano is also a former Italian ambassador to Moscow.
Document 13: Great power: Milena Sterio, American expert of international law, includes the former axis powers (Germany, Italy and Japan) and India among the great powers along with the permanent members of the UNSC. She considers Germany, Japan and Italy to be great powers due to their G7 membership and because of their influence in regional and international organizations.  Various authors describe Italy as an equal major power, while others view Italy as an "intermittent great power" or as "the least of the great powers".
Document 14: Christopher Rowley: Christopher Rowley was born in 1948 in Lynn, Massachusetts to an American mother and an English father. Educated for the most part at Brentwood School, Essex, England, he became a London-based journalist in the 1970s. In 1977 he moved to New York City, and he currently lives in upstate New York's Hudson Valley.
Document 15: Ralph Natale: According to New York Daily Times reporter and veteran gangland "insider" Larry McShane, Natale's father was an associate of the Philadelphia crime family and operated a numbers operation for them. His relationship with his father was very poor; he had once repeatedly kicked him because Natale missed his curfew. Natale was mentored by hitman Felix "Skinny Razor" DiTullio, who had previously taught Nicky Scarfo how to kill. Described by himself as a friend of former Philadelphia boss Angelo Bruno, Natale's mob association began when he became boss of the Bartenders Union Local 170, allegedly running it on Bruno's behalf. One of the three former 170 union leaders, Joseph McGreal, demanded that Natale be removed as the union leader; McGreal was subsequently murdered in 1973, Andrew Thomas DelGiorno is believed to be the killer. Sources allege that he was connected to members of the Gambino crime family and sorted out a dispute between a biker gang and the Gambino family in the late 60s. In 1970, Natale murdered conman George Feeney after he insulted Natale and his mentor Angelo Bruno. He was also known for assisting the Philadelphia mob in taking over casinos in Atlantic City during the late 1970s.
ground_truth: Columbia University
sub_queries: Excellent Cadavers >> author Answer: Alexander Stille
What college did Alexander Stille go to? Answer: Columbia University