Question: Reima Karppinen won a silver medal in the double sculls at the Rowing Championships held in what German city?

Passages:
Kjetil Borch (born 14 February 1990 in Tønsberg) is a Norwegian rower.  His career highlights include finishing third at the 2009 World Rowing U23 Championships with Truls Albert in bow seat.  Together with Nils Jakob Hoff he was fourth in the double sculls event at the 2010 World Rowing Championships and gold at the 2013 World Rowing Championships. Andrew Campbell, born February 2, 1992, is an American rower who placed third in the Lightweight Single at the 2012 World Rowing Championship and fourth in the Lightweight Single at the 2011 World Rowing Championships.  He is also a Bronze medalist both in the single at the 2010 Junior World Rowing Championships and in the lightweight single at the 2011 Under-23 World Rowing Championships.  Both finishes were the highest ever for the United States in their respective events.  He also competed at the Under-23 World Rowing Championships in 2009 in the lightweight double and finished 17th.  Campbell missed qualification for the 2012 Olympic Games in the Men's Lightweight Double Sculls, placing 3rd at the 2012 Final Olympic Qualification Regatta.  He graduated from Harvard University in 2014. Hans-Joachim Böhmer (1 October 1940 – 28 December 1999) was an East German rower who won a bronze medal in the double sculls at the 1972 Summer Olympics, together with Hans-Ulrich Schmied.  They also won a European title in 1971 and a silver medal at the 1970 World Rowing Championships.  In other rowing events Böhmer won a bronze medal in the eights at the 1966 World Rowing Championships. Akiko Iwamoto (岩本 亜希子 , Iwamoto Akiko , born September 25, 1978) is a Japanese rower.  She was born in Nagano Prefecture.  She competed in the Women's lightweight double sculls at the 2012 Summer Olympics, reaching the semi-finals with her teammate Atsumi Fukumoto and ranking 12th overall.  She competed in the same event at the 2000, 2004 and 2008 Summer Olympics, finishing 9th, 14th and 13th respectively.  She won a silver medal in the Women's double sculls at the 2002 Asian Games.  She also won a silver medal in the Women's lightweight double sculls at the 2006 Asian Games, and another silver medal in the Women's lightweight double sculls at the 2010 Asian Games. Reima Juhani Karppinen (born 27 January 1958) is a retired Finnish rower who specialized in the double sculls.  In this event, he won a silver medal at the 1981 World Rowing Championships, together with his legendary brother Pertti.  He competed at the 1984, 1988 and 1992 Summer Olympics, with other partners, and finished in 8th, 12th and 13th place, respectively. Stany Delayre (born 26 October 1987 in Bergerac) is a French rower.  At the 2012 Summer Olympics, he competed with Jérémie Azou in the men's lightweight double sculls, finishing in 4th place.  On home water, he and Azou won the 2015 World Championship in that event.  Their team also won the silver medal at the 2014 World Championships, and won the 2013, 2014 and 2015 European Championships.  In 2009, Delayre was part of the French men's lightweight quadruple sculls time at the World Championships.  He was also part of the French under-23s men's lightweight quadruple sculls at the 2006 and 2007 Junior World Rowing Championships. Jason Osborne (born 20 March 1994) is a German rower.  He won silver as part of the German team in the lightweight men's quadruple sculls at the 2013 World Rowing Championships in Chungju, Korea.  He has also won medals in a number of competitions in the World Rowing Cup and European Championships.  He competed in the men's lightweight double sculls event at the 2016 Summer Olympics. The 1981 World Rowing Championships were World Rowing Championships that were held from 30 August to 6 September 1981 at Oberschleißheim outside Munich, Germany. Nathan Phillip Cohen MNZM (born 2 January 1986) is a New Zealand rower.  He is a two-time world champion, and won a gold medal in the Olympics.  In 2006, rowing a single scull, he won a gold medal at the World University Games.  In doing so, he became the first New Zealander to win a gold medal at the World University Games in any sport.  Cohen and his rowing partner, Joseph Sullivan, won back-to-back gold medals in the men's double sculls at both the 2010 and 2011 World Rowing Championships.  At the 2012 Summer Olympics, he and his partner won the gold medal in the men's double sculls, after breaking the Olympic best time in the heats.  In 2013, Cohen was made a Member of the New Zealand Order of Merit for his services to rowing. Jüri Jaanson (born 14 October 1965 in Tartu) is the most successful Estonian rower of all time and the winner of five medals at World Rowing Championships.  He became World Champion in Tasmania 1990 in the single sculls event.  14 years later, at age 38 he won an Olympic silver medal in the single sculls event at the 2004 Summer Olympics in Athens.  In Beijing 2008 he won his second Olympic silver medal, this time in the double sculls event with Tõnu Endrekson.  He is a member of the SK Pärnu rowing club located in Pärnu.  In 2007, Jaanson became the oldest rower ever to win a World Cup event at the age of 41 in Amsterdam.

Supporting sentences:
 In this event, he won a silver medal at the 1981 World Rowing Championships, together with his legendary brother Pertti. The 1981 World Rowing Championships were World Rowing Championships that were held from 30 August to 6 September 1981 at Oberschleißheim outside Munich, Germany.