Question: Which is a heavy metal band, Gary Braver or System of a Down?

full_context: Document 1: Roger Luckhurst: Roger Luckhurst is a British academic and writer. He is Professor in Modern and Contemporary Literature in the Department of English and Humanities at Birkbeck, University of London and Distinguished Visiting Professor at Columbia University. He works on Victorian literature, contemporary literature, trauma studies, and speculative/science fiction. Luckhurst is notable for his role as a Distinguished Visiting Professor at Columbia, for his introductions and editorships to the Oxford World’s Classics series volumes -- "Late Victorian Gothic Tales," "Dracula", "Strange Case of Dr Jekyll and Mr Hyde, The Portrait of a Lady," H.P. Lovecraft's "Classic Horror Tales, King Solomon’s Mines," and "The Time Machine --" and for his books, "The Trauma Question" (Routledge, 2008), "The Mummy’s Curse: The True Story of a Dark Fantasy" (Oxford University Press, 2012), and "Zombies: A Cultural History" (Reaktion Press, 2015).
Document 2: Daniel Gutstein: Dan Gutstein (born in Cleveland, Ohio in 1968) is an American writer who has published two collections of writing, "non/fiction" (prose, Edge Books, 2010) and "Bloodcoal & Honey" (poetry, Washington Writers' Publishing House, 2011), as well as poetry, fiction shorts, fiction, drama, and memoir widely in literary magazines, and who has taught poetry and fiction writing, composition, and literature at George Washington University, University of Michigan, the Writer's Center in Bethesda, Maryland, and the Smithsonian Institution's Campus on the Mall program. Currently, he works at Maryland Institute College of Art in Baltimore, where he runs the Writing Studio and Learning Resource Center, which serves students who have disabilities. He has received grants and awards from the Maryland State Arts Council, Arts and Humanities Council of Montgomery County, Maryland, Bread Loaf Writer's Conference, and the University of Michigan, where he earned an MFA in creative writing (poetry). In 1990, he graduated from the George Washington University with a B.A. in economics, and worked for the now-defunct accounting and consulting firm, Arthur Andersen & Co. He has held a number of other positions outside academia, serving an association of science museums as editor-in-chief, a major Washington, D.C. theatre as an educator, and a national news organization as Capitol Hill Reporter. He has also done farm work and taught taekwondo. The web site Rate My Professors recently named him the 2010-2011 "hottest" professor in America, a development that was reported by the Huffington Post, among other media outlets.
Document 3: Murat Gülsoy: Murat Gülsoy (born 1967) is a Turkish writer. He started his literary career as a publisher and a writer of the bimonthly magazine "Hayalet Gemi" (Ghost Ship) in 1992. His works explore the metafictive potential of postmodern self-consciousness with ‘page turning’ plots. He also produced interactive hypertext works on internet exploring new ways of narrative. Gülsoy has published 18 books in Turkey so far. Besides short stories, he has eight novels addressing modern masters Kafka, Borges, Eco, Laurence Sterne, Fowles and Orhan Pamuk. He is the recipient of some of the most prestigious national literary awards. He conducts creative writing workshops since 2004. Besides being a writer, he is also a professor with Bogazici University at Institute of Biomedical Engineering. He is the head of the editorial board of Bogazici University Press and director of Bogazici University Nazım Hikmet Culture and Art Research Center. "Stehlen Sie dieses Buch" is his first book to be translated into German (Literaturca Verlag). His novels are published in English, Macedonian, Arabics, Bulgarian, Albanian and Chinese. His 2000 Sait Faik Award-winning book "Bu Kitabı Çalın" (Steal This Book) ironically "borrows" (or steals) its name from Abbie Hoffman's 1971 book "Steal This Book" and it is referred in the book as a postmodern parody.
Document 4: Elect the Dead: Elect the Dead is the debut album by rock musician Serj Tankian, lead singer and founding member of Armenian-American metal quartet System of a Down. It was released on October 22, 2007. Alongside Tankian appears Armenian-American coloratura Ani Maldjian, drummers John Dolmayan from System of a Down and B. Brain Mantia of Primus and Guns N' Roses, Dan Monti on guitars, as well as a string section featuring Antonio Pontarelli.
Document 5: Shavo Odadjian: Shavarsh "Shavo" Odadjian (Armenian: Շավարշ "Շավո" Օդաջյան ; born April 22, 1974) is an Armenian American songwriter, multi-instrumentalist, music video director/editor, music producer, and artist/painter. He is best known as the bassist, backing vocalist and occasional songwriter of the Grammy Award-winning metal band System of a Down. During the band's hiatus from 2006 to 2010, Odadjian collaborated with Wu-Tang Clan founder RZA on a project called AcHoZeN, which contributed a number of songs to the motion picture "Babylon A.D." A compilation album was released in 2015. Odadjian is also credited with the musical scoring of the film, alongside The Rza and Hans Zimmer. He originally used Gibson Thunderbird basses, a Fender Jazz Bass, an Ibanez BTB bass guitar, and a Music Man StingRay, but has since moved on to Warwick basses.
Document 6: Serj Tankian: Serj Tankian (Western Armenian: Սերժ Թանկեան , ] ; born August 21, 1967) is a Lebanese-born Armenian-American singer-songwriter, composer, multi-instrumentalist, record producer, poet, and political activist with Armenian descent. He is best known as the lead vocalist, songwriter, keyboardist, and occasional live rhythm guitarist of the metal band System of a Down, formed in 1994.
Document 7: Gary Varner: Gary Edward Varner (born March 10, 1957) is an American philosopher specialising in environmental ethics, philosophical questions related to animal rights and animal welfare, and R. M. Hare's two-level utilitarianism. He is currently a professor in the Department of Philosophy at Texas A&M University, and has been based at the university since 1990. He was educated at Arizona State University, the University of Georgia and the University of Wisconsin–Madison; at Madison, where he was supervised by Jon Morline, he wrote one of the first doctoral theses on environmental ethics. Varner's first monograph was "In Nature's Interests?", which was published by Oxford University Press in 1998. In the book, Varner defended a form of biocentric individualism, according to which all living entities have morally considerable interests.
Document 8: Serart: Serart is a collaboration album by two international Armenian musicians: Serj Tankian ("Ser-"), lead singer of System of a Down, and folk multi-instrumentalist Arto Tunçboyacıyan ("-art"). It was the first release on Tankian's own label, Serjical Strike Records.
Document 9: Paul Jankowski: Paul Jankowski is a history professor at Brandeis University. Jankowski has given several lectures concerning important world affairs such as the Paris riots. He has written books about events like the Stavisky Affair. He is the Raymond Ginger Professor of History at Brandeis University, and the former chair of the history department. His expertise is in modern French and European history, as well as war and conflict in European history. He did his undergraduate and doctoral work at Oxford University.
Document 10: System of a Down: System of a Down, sometimes shortened to System and abbreviated as SOAD, is an Armenian-American heavy metal band from Glendale, California, formed in 1994. The band currently consists of Serj Tankian (lead vocals, keyboards), Daron Malakian (vocals, guitar), Shavo Odadjian (bass, backing vocals) and John Dolmayan (drums).
Document 11: Gary Braver: Gary Goshgarian known by his pen name Gary Braver is an English professor at Northeastern University (Boston), United States, where he teaches courses in science fiction, modern bestsellers, horror fiction, and fiction writing.
Document 12: John Dolmayan: John Hovig Dolmayan (Armenian: Ջոն Դոլմայան , born July 15, 1973) is a Lebanese-born Armenian–American songwriter and drummer. He is best known as the drummer of System of a Down. Dolmayan is also the drummer for the band Indicator and former drummer for Scars on Broadway. His energetic live performances with System Of A Down over the years, have garnered him critical acclaim. Loudwire listed him as one of the "Top 50 Hard Rock + Metal Drummers Of All Time" , with Dolmayan being ranked at #22.
Document 13: System of a Down discography: System of a Down is an American rock band formed by musicians of Armenian origin: vocalist Serj Tankian, guitarist Daron Malakian, bassist Shavo Odadjian, and drummer John Dolmayan in the mid-1990s. They have released five studio albums, 16 singles, and 11 music videos. By the end of 1997, the group had signed to American Recordings, then distributed as Columbia Records. The following year, they released their eponymous debut album, which peaked at #124 on the United States' "Billboard" 200 and #103 on the United Kingdom's UK Albums Chart; it was certified platinum two years later by the Recording Industry Association of America (RIAA), and gold by Canadian Recording Industry Association (CRIA). Their eponymous debut album produced a single for the song "Sugar", which reached the top 30 on the "Billboard" mainstream rock songs and alternative songs charts. Their follow-up album, "Toxicity" (2001), topped the US and Canadian charts, and also reached the top 10 in Australia, Finland, and New Zealand. The album was certified triple platinum in its home country, and triple platinum in Australia by the Australian Recording Industry Association (ARIA), as well as double platinum by CRIA in Canada. "Toxicity" produced singles for the title track, "Chop Suey!", and "Aerials". The last of these peaked at number one on the "Billboard" Mainstream Rock Songs and Alternative Songs charts.
Document 14: Jean Graham: Jean E. Graham, Ph.D. is an American scholar, translator, and Associate Professor of English at The College of New Jersey, where she has taught since 1994. Dr. Graham also served lunch in Eickhoff Hall. She regularly taught courses in British literature (especially Milton and Metaphysical Poetry), young adult literature, and Anglo-American African women writers. Her research interests were varied: topics of recent publications and current projects include John Bunyan, Star Trek, Amy Tan, and C. S. Lewis’s Narnian chronicles.
Document 15: Daron Malakian: Daron Vartan Malakian (Armenian: Տարօն/Տարոն Վարդան Մալաքեան, born July 18, 1975) is an Armenian–American singer-songwriter, multi-instrumentalist, and record producer. He is best known as the guitarist, songwriter and second vocalist of the rock band System of a Down and as the lead vocalist, lead guitarist and songwriter of the band Scars on Broadway. Like the rest of the Hollywood-based band System of a Down, he is of Armenian ancestry, but he is the only member to have been born in the United States. Daron Malakian is known for his distinctive playing and is ranked 40th in Loudwire's list of "Top 50 Hard Rock + Metal Guitarists Of All Time" and #11 in MusicRadar's poll, "The 20 Greatest Metal Guitarists Ever". He is placed 30th in Guitar World's List of The 100 Greatest Heavy Metal Guitarists of All Time.
ground_truth: System of a Down