Question: When did the founder of Bang & Olufsen die?

full_context: Document 1: Good Design: The Good Design movement was an artistic movement or design concept that originated in the 1930s, but took form principally in the United States immediately after the Second World War. Designs made under the influence of Good Design include buildings and furniture, but also everyday objects such as kitchen implements, household objects and garden tools. Names associated with the movement include Charles and Ray Eames, László Moholy-Nagy and Hans Wegner,
Document 2: Jensen Electronics: Jensen is a consumer electronics brand with a history that dates back to 1915 with Peter L. Jensen's invention of the first loudspeaker. Over the years the Jensen family of brands has grown to include Jensen, Advent, Acoustic Research (AR), Phase Linear and NHT Loudspeakers (Now Hear This) in the United States and Magnat and Macaudio in Germany. In 2004, Audiovox Corporation added the Jensen portfolio of brands to their mobile and consumer electronics lines. In 2015, Dual Electronics Corporation (Namsung America) acquired Jensen, however Audiovox maintains its selection of Advent-branded car audio/navigation head units from its line.
Document 3: Jacob Jensen: Jacob Jensen (29 April 1926 – 15 May 2015) was a Danish industrial designer best known for his work with Bang & Olufsen. Jensen designed numerous popular high-end consumer products, developing a functional minimalism style that formed a prominent part of the Danish modern movement. In 1958 he founded the "Jacob Jensen Design Studio." Jensen designed for other brands including Alcatel, Kirk, Boform, General Electric, International Gift Corporation, JO-JO, Labofa, Rodenstock, Rosti (Rosti Mepal), and Stentofon. His works have been featured at the Museum of Modern Art (MoMA) in New York City, and have received numerous design awards.
Document 4: Sam Lewis (game designer): Sam Lewis is an American designer of board games and former line developer of the "Renegade Legion" line in FASA Corporation. He was also president of FASA for a time.
Document 5: David Lewis (designer): David Whitfield Lewis (19 February 1939 – 8 November 2011) was an industrial designer. He is best known for his work for Bang & Olufsen. He was a distinguished member of Royal Designers for Industry. Several of the products he designed are included in the MoMA permanent collection of design.
Document 6: BeoSound 2: The BeoSound 2 is a digital audio player supplied by Bang & Olufsen. It plays MP3- and WMA-format audio stored on Secure Digital or MMC media. The device is finished in polished stainless steel.
Document 7: Fritz Hansen: Fritz Hansen, also known as Republic of Fritz Hansen, is a Danish furniture design company. Designers who have worked for Fritz Hansen include Arne Jacobsen (1902–1971), Poul Kjærholm (1929–1980), Hans J. Wegner (1914–2007) and Piet Hein (1905–1996). Fritz Hansen also collaborates with contemporary furniture architects including Hiromichi Konno, Cecilie Manz, and Kasper Salto.
Document 8: Bose Corporation: Bose Corporation is an American privately held corporation, based in Framingham, Massachusetts, that designs, develops and sells audio equipment. Founded in 1964 by Amar Bose, the company sells its products throughout the world. Forbes estimates that in the 2015 financial year, Bose received revenue of US$3.5 billion and employed approximately 11,700 people.
Document 9: Bang &amp; Olufsen: Bang & Olufsen (B&O) (stylized as BANG & OLUFSEN) is a high-end Danish consumer electronics company that designs and manufactures audio products, television sets, and telephones. It was founded in 1925 by and Svend Olufsen, who designed a radio to work with alternating current, a product of significance at a time when most radios were still running on batteries. In 2004, the company opened a factory in the Czech Republic where it employed approximately 250 staff producing mainly audio products.
Document 10: John David Lewis: John David Lewis (March 17, 1955 – January 3, 2012) was a political scientist, historian and Objectivist scholar who held the post of visiting associate professor in the Philosophy, Politics and Economics Program at Duke University from 2008 to 2012, as well as Associate Professor of Business at the University of North Carolina at Chapel Hill. Lewis was also an Anthem Fellow for Objectivist Scholarship. Lewis received his PhD in classical studies at Cambridge University in 2001, with the dissertation, "Solon’s Polis as Kosmos: Intellectual, Moral and Political Integration in Archaic Athens". He taught at the University of London from 2000-2001. From 2001 to 2008, he was a professor in the History and Political Science Department at Ashland University, where contention surrounding his promotion to tenured professor drew national attention. Lewis was a member of the American Political Science Association, the Association of Ancient Historians, the Society for Military History, the American Philological Association, and the Cambridge Philological Society. Lewis published three books, was a contributing editor to "The Objective Standard" and contributed to "Capitalism Magazine" and contributed to multiple publications including "Journal of Business Ethics", "Social Philosophy and Policy", "Polis", "Dike", and "Bryn Mawr Classical Review". Lewis frequently spoke at Objectivist conferences and Tea Party events. He also spoke on the morality of free markets in medicine, arguing that innovators ought to be freed from unnecessary regulation. Lewis died on January 3, 2012 after a long battle with cancer. He was 56.
Document 11: Beocenter 9500: The BeoCenter 9500 is an integrated home music system by Bang & Olufsen. It consists of an AM/FM receiver, CD player and cassette recorder. Its award winning design features a mirrored exterior of polished aluminium and smoked glass. The BeoCenter 9500 has no buttons: it is controlled by touching the glass with one’s fingertip.
Document 12: Johannes Torpe: Johannes Torpe (born 5 January 1973 in Skanderborg, Denmark) is a Danish designer, musician, producer, and former creative director of Bang & Olufsen (2011-2015). Currently, he is the CEO and creative director of the design company Johannes Torpe Studios based in Copenhagen, Denmark.
Document 13: David Lewis-Williams: James David Lewis-Williams (born in 1934 in Cape Town) is a South African archaeologist. He is best known for his research on southern African San (Bushmen) rock art, of which it can be said that he found a 'Rosetta Stone'. He is the founder and previous director of the Rock Art Research Institute and is currently professor emeritus of cognitive archaeology at the University of the Witwatersrand (WITS). Lewis-Williams is recognised by the National Research Foundation (NRF) of South Africa as a leading international researcher, with an A1 rating.
Document 14: David Lewis (philosopher): David Kellogg Lewis (September 28, 1941 – October 14, 2001) was an American philosopher. Lewis taught briefly at UCLA and then at Princeton from 1970 until his death. He is also closely associated with Australia, whose philosophical community he visited almost annually for more than thirty years. He made contributions in philosophy of language, philosophy of mind, philosophy of probability, metaphysics, epistemology, philosophical logic, and aesthetics. He is probably best known for his controversial modal realist stance: that (i) possible worlds exist, (ii) every possible world is a concrete entity, (iii) any possible world is causally and spatiotemporally isolated from any other possible world, and (iv) our world is among the possible worlds.
Document 15: Svend Olufsen: Svend Olufsen was a Danish electrical engineer who co-founded Bang & Olufsen with . Like Bang, Olufsen studied at the Technical University of Aarhus. Olufsen and Bang both shared an enthusiasm for radio, which at the time was in its infancy.
ground_truth: 8 November 2011