Question: Who is younger, Thomaz Koch or Sherwood Stewart?
Context: Nathan "Nate" Henry (born November 9) was the lead singer and bassist for the indie rock band Sherwood.  The band officially announced their breakup in February 2012.  He, Dan Koch, and Chris Armstrong formed the band in 2002 while they were attending college in San Luis Obispo, California.  He and Dan Koch composed all of Sherwood's songs, and Henry directed Sherwood's first music video "Song in My Head".  According to the Sherwood Show pilot episode, Henry created the show. The Khartoum International is a defunct tennis tournament that was played on the Grand Prix tennis circuit in 1976.  The event was held in Khartoum, Sudan and was played on outdoor hard courts.  Mike Estep won the singles title, defeating Thomaz Koch in the final. Sherwood Stewart (born June 6, 1946, in Goose Creek, Texas, United States) played amateur and professional tennis in the 1970s and 1980s.  Stewart was ranked as high as No. 60 in the world in singles on the ATP Rankings on December 31, 1978, and No. 4 in doubles on January 3, 1983. Sherwood Stewart and Ferdi Taygan were the defending champions but they competed with different partners that year, Stewart with Mark Edmondson and Taygan with Cássio Motta. Thomaz Koch (born May 11, 1945 in Porto Alegre), is a left-handed former tennis player from Brazil, who was a quarter-finalist at the French Open, Wimbledon and the U.S. National Championships. Fiorella Bonicelli (born 21 December 1951) is a retired professional tennis player from Uruguay.  During her career, she won the 1975 French Open mixed doubles title with Thomaz Koch.  She also won the 1976 French Open women's doubles title with Gail Lovera, defeating Kathleen Harter and Helga Niessen Masthoff 6–4, 1–6, 6–3.  At the Fed Cup, her singles record is 11–4, and doubles record 6–8.  During her career, she reached one Grand Slam singles quarterfinal, at the 1978 French Open, where she lost to Virginia Ruzici 6–7, 6–4, 6–8. Maria Fernanda Barbato Alves (born 17 April 1983), also known as Nanda Alves, is a Brazilian tennis player.  She is currently coached by her father Carlos and former tennis player Thomaz Koch.  As of 1 March 2010, Alves is ranked World No. 262, and is the highest ranked Brazilian player.  She has enjoyed success at the ITF Circuit, winning 18 singles and 26 doubles titles so far.  Alves made her WTA Tour debut at Copa Colsanitas in 2004, and has played qualifications for all four Grand Slam events.  Partnering with Vanessa Henke, Alves took part in the 2005 Australian Open doubles event, but they lost to Daniela Hantuchová and Martina Navratilova in the first round. The Turkey Open is a defunct tennis tournament that was played on the Grand Prix tennis circuit in 1975.  The event was held in Istanbul, Turkey.  Colin Dowdeswell won the singles title while Colin Dibley and Thomaz Koch partnered to win the doubles title. Marty Riessen and Sherwood Stewart were the defending champions, but Riessen did not participate this year.  Stewart partnered Ferdi Taygan, finishing runner-up. Bruno Fraga Soares (] ; born February 27, 1982, in Belo Horizonte) is a professional tennis player from Brazil.  His highest singles ranking on the ATP Tour is World No. 221, which he reached in March 2004.  Primarily a doubles specialist, his career-high doubles ranking is World No. 2, which he achieved in October 2016.  After a few efforts, including a final in the 2012 US Open and the semifinals of the 2008 and 2013 French Opens, Soares finally won his first Grand Slam title at the 2016 Australian Open, partnering Jamie Murray and then followed that up with a second men's doubles title at the 2016 US Open.  He has also won three Grand Slam titles in Mixed Doubles, two at the US Open, in 2012 and 2014, and one at the Australian Open in 2016.  He was the third Brazilian tennis player to achieve this, after Maria Bueno and Thomaz Koch.
Answer: Sherwood Stewart