Question: Alberto Granado authored a memoir that was a reference for the 2004 film about which revolutionary?

Alberto Granado Jiménez (August 8, 1922March 5, 2011) was an Argentine–Cuban biochemist, doctor, writer, and scientist.  He was also the youthful friend and traveling companion of Che Guevara during their 1952 motorcycle tour in Latin America.  Granado later founded the Santiago School of Medicine.  He authored the memoir "Traveling with Che Guevara: The Making of a Revolutionary", which served as a reference for the 2004 film "The Motorcycle Diaries", in which he was played by Rodrigo de la Serna.  An elderly Alberto Granado makes a short appearance at the end of the film. <SEP> The Motorcycle Diaries (Spanish: "Diarios de Motocicleta" ) is a memoir that traces the early travels of Marxist revolutionary Ernesto "Che" Guevara, then a 23-year-old medical student, and his friend Alberto Granado, a 29-year-old biochemist.  Leaving Buenos Aires, Argentina, in January 1952 on the back of a sputtering single cylinder 1939 Norton 500cc dubbed "La Poderosa" ("The Mighty One"), they desired to explore the South America they only knew from books.  During the formative odyssey Guevara is transformed by witnessing the social injustices of exploited mine workers, persecuted communists, ostracized lepers, and the tattered descendants of a once-great Inca civilization.  By journey's end, they had travelled for a symbolic nine months by motorcycle, steamship, raft, horse, bus, and hitchhiking, covering more than 8000 km across places such as the Andes, Atacama Desert, and the Amazon River Basin.  The diary ends with a declaration by Guevara, born into an upper-middle-class family, displaying his willingness to fight and die for the cause of the poor, and his dream of seeing a united Latin America. <SEP> Jack Abraham Newfield (February 18, 1938 – December 21, 2004) was an American muckraking journalist, columnist, author, documentary filmmaker, activist, and fierce champion of underdogs.  Newfield wrote for the "Village Voice", "New York Daily News", "New York Post", "New York Sun", "New York Magazine", "Parade Magazine", "Tikkun", "Mother Jones", and "The Nation" and monthly columns for several labor union newspapers.  Newfield believed that "the facts" should be contextualized within larger understandings.  In his autobiography, "Somebody's Gotta Tell It: The Upbeat Memoir of a Working-Class Journalist" (2002), Newfield stated, "The point is not to confuse objectivity with truth."  A career beat reporter, Newfield wrote prolifically about modern society, culture, and politics, on a range of topics relevant to urban life, such as municipal corruption, the police, and labor unions, and also professional sports, especially baseball and boxing, as well as contemporary music.  He authored numerous books about modern social and political subjects, including "A Prophetic Minority" (1966) and "Robert Kennedy : A Memoir."  His received the American Book Award for "The Full Rudy: The Man, the Myth, the Mania" about New York City Mayor Rudy Giuliani.  Newfield was a senior fellow at The Nation Institute, and an Emmy-award winning documentary filmmaker. <SEP> The Motorcycle Diaries (Spanish: "Diarios de motocicleta" ) is a 2004 biopic about the journey and written memoir of the 23-year-old Ernesto Guevara, who would several years later become internationally known as the iconic Marxist guerrilla commander and revolutionary Che Guevara.  The film recounts the 1952 expedition, initially by motorcycle, across South America by Guevara and his friend Alberto Granado.  As well as being a road movie, the film is a coming-of-age film; as the adventure, initially centered on youthful hedonism, unfolds, Guevara discovers himself transformed by his observations on the life of the impoverished indigenous peasantry.  Through the characters they encounter on their continental trek, Guevara and Granado witness firsthand the injustices that the destitute face and are exposed to people and social classes they would have never encountered otherwise.  To their surprise, the road presents to them both a genuine and captivating picture of Latin American identity.  As a result, the trip also plants the initial seed of cognitive dissonance and radicalization within Guevara, who ostensibly would later view armed revolution as a way to challenge the continent's endemic economic inequalities and political repression.