Question:  Who flew on a 1985 Space Shuttle "Challenger" mission as a Payload Specialist, Claude Nicollier or  Lodewijk van den Berg?

full_context: Document 1: European Astronaut Corps: The European Astronaut Corps is a unit of the European Space Agency (ESA) that selects, trains, and provides astronauts as crew members on U.S. and Russian space missions. As of Nov 2014, 24 ESA astronauts are now able to go board the ISS. There are currently 47 members of the Corps, 26 currently active. The European Astronaut Corps is based at the European Astronaut Centre in Cologne, Germany. They can be assigned to various projects both in Europe (at ESTEC, for instance) or elsewhere in the world, at NASA Johnson Space Center or Star City.
Document 2: Claudie Haigneré: Claudie (André-Deshays) Haigneré (born 13 May 1957) is a French doctor, politician, and former astronaut with the Centre National d'Études Spatiales (1985–1999) and the European Space Agency (1999–2002).
Document 3: Wubbo Ockels: Wubbo Johannes Ockels (28 March 1946 – 18 May 2014) was a Dutch physicist and an astronaut of the European Space Agency (ESA). In 1985 he participated in a flight on the space shuttle Challenger, STS-61-A, making him the first Dutch citizen in space. After his astronaut career, Ockels was professor of "Aerospace for Sustainable Engineering and Technology" at the Delft University of Technology.
Document 4: Chris Hadfield: Chris Austin Hadfield {'1': ", '2': ", '3': ", '4': "} (born 29 August 1959) is a retired Canadian astronaut who was the first Canadian to walk in space. An engineer and former Royal Canadian Air Force fighter pilot, Hadfield has flown two space shuttle missions and served as commander of the International Space Station.
Document 5: Janwillem van den Berg: Janwillem van den Berg (26 November 1920 in Akkrum – 18 October 1985 in Groningen) was a Dutch speech scientist and medical physicist who played a major role in establishing the myoelastic-aerodynamic theory of voice production. The most notable aspect of van den Berg's theory is its impact on modern speech science in providing a foundation for modern models of vocal fold function.
Document 6: Claude Nicollier: Claude Nicollier (born 2 September 1944 in Vevey, Switzerland) is the first astronaut from Switzerland. He has flown on four Space Shuttle missions. His first spaceflight (STS-46) was in 1992, and his final spaceflight (STS-103) was in 1999. He took part in two servicing missions to the Hubble Space Telescope (called STS-61 and STS-103). During his final spaceflight he participated in a spacewalk, becoming the first European Space Agency astronaut to do so during a Space Shuttle mission (previous ESA astronauts conducted spacewalks aboard "Mir", see List of spacewalks and moonwalks 1965–1999). In 2000 he was assigned to the Astronaut Office Extravehicular Activity Branch, while maintaining a position as Lead ESA Astronaut in Houston. Nicollier retired from ESA in April 2007.
Document 7: Christer Fuglesang: Arne Christer Fuglesang (] ) (born March 18, 1957 in Stockholm) is a Swedish physicist and an ESA astronaut. He was first launched aboard the STS-116 Space Shuttle mission on December 10, 2006, at 01:47 GMT, making him the first Swedish citizen in space.
Document 8: L.W.C van den Berg: Lodewijk Willem Christiaan van den Berg (October 19, 1845 – March 2, 1927), or more commonly known as L.W.C. van den Berg, was a Dutch oriental scholar in the Dutch colonial era famous with his research on Arab Indonesians of Hadhrami descent, which was the first detailed research of its kind in the world at the time.
Document 9: Albert Jan van den Berg: Albert Jan van den Berg (born 14 June 1949 in Amsterdam) is a founding partner of Hanotiau & van den Berg in Brussels (since 2001), a Emeritus Professor of Law at the Erasmus University, Rotterdam, a visiting Professor at Georgetown University Law Center, Washington DC and at the University of Tsinghua School of Law, Beijing and a member of the Advisory Board and Faculty of the Geneva Master of Laws in International Dispute Settlement (MIDS), Geneva.
Document 10: Space Shuttle Challenger: Space Shuttle "Challenger" (Orbiter Vehicle Designation: OV-099) was the second orbiter of NASA's space shuttle program to be put into service following "Columbia". The shuttle was built by Rockwell International's Space Transportation Systems Division in Downey, California. Its maiden flight, STS-6, started on April 4, 1983. It launched and landed nine times before breaking apart 73 seconds into its tenth mission, STS-51-L, on January 28, 1986, resulting in the death of all seven crew members, including a civilian school teacher. It was the first of two shuttles to be destroyed in flight, the other being "Columbia" in 2003. The accident led to a two-and-a-half year grounding of the shuttle fleet; flights resumed in 1988 with STS-26 flown by "Discovery". "Challenger" itself was replaced by "Endeavour" which was built using structural spares ordered by NASA as part of the construction contracts for "Discovery" and "Atlantis".
Document 11: Lodewijk van den Berg: Lodewijk van den Berg (] ; born March 24, 1932) is a Dutch American chemical engineer, specializing in crystal growth, who flew on a 1985 Space Shuttle "Challenger" mission as a Payload Specialist.
Document 12: Michael Foale: Colin Michael Foale, CBE (born 6 January 1957) is a British-American astrophysicist and former NASA astronaut. He is a veteran of six Space Shuttle missions and extended missions on both Mir and the International Space Station. He was the first Briton to perform a space walk, and until 17 April 2008, he held the record for most time spent in space by a US citizen: 374 days, 11 hours, 19 minutes. He still holds the cumulative-time-in-space record for a UK citizen.
Document 13: Paolo Nespoli: Paolo Angelo Nespoli (Milan, 6 April 1957) is an Italian astronaut and engineer. In 2007, he first traveled into space aboard the Space Shuttle Discovery as a mission specialist of STS-120. In December 2010 he again traveled into space aboard the Soyuz TMA-20 spacecraft as an Expedition 26/27 flight engineer.
Document 14: Ulf Merbold: Dr. Ulf Dietrich Merbold (born June 20, 1941) is the first West German citizen and second German native (after Sigmund Jähn) to have flown in space. He is also the first member of the European Space Agency Astronaut Corps to participate in a spaceflight mission and the first non-US citizen to reach orbit in a US spacecraft. In 1983, he and Byron Lichtenberg became the first Payload Specialists to fly on the shuttle.
Document 15: Jean-François Clervoy: Jean-François André Clervoy (born 19 November 1958) is a French engineer and a CNES and ESA astronaut. He is a veteran of three NASA Space Shuttle missions.
ground_truth: Lodewijk van den Berg