Question: Claude Nicollier and André Kuipers were both astronauts of which space agency?
Context: The Arges project was a research project in the field of metal-halide lamps, a form of electric lighting.  The aim was to achieve a higher degree of energy efficiency in comparison to lamps used at the time.  The project was commissioned by Eindhoven University of Technology and Philips Electronics.  One of the problems which had to be solved was to let the experimental lamps burn reliably and constantly.  Scientists believed that this problem was related to gravity, and to ascertain this experiments had to be performed in zero gravity.  Therefore, part of the research took place aboard the International Space Station ISS during the Delta Mission in 2004.  Dutch astronaut André Kuipers operated the apparatus transported to the ISS aboard the Soyuz TMA-4. Interbol (Russian: Интербол ) is an international space project under the leadership of the Russian Space Agency and the Space Research Institute of the Russian Academy of Sciences.  The list of participants includes the Institute of Atmospheric Research of the Czech Academy of Sciences, NASA, European Space Agency, Japan Aerospace Exploration Agency, and the Canadian Space Agency.  The goal of the project is to study the correlations between plasma processes in the tail of the magnetosphere and in the Van Allen radiation belt (auroral particles acceleration region) with a high time-space resolution.  Two space probes have been launched into high-altitude elliptical orbits: André Kuipers (] ; born 5 October 1958) is a Dutch physician and ESA astronaut.  He became the second Dutch citizen, third Dutch-born and fifth Dutch-speaking astronaut upon launch of Soyuz TMA-4 on 19 April 2004.  Kuipers returned to Earth aboard Soyuz TMA-3 11 days later. The Austrian Space Agency, since 2005 officially Aeronautics and Space Agency (German: Agentur für Luft- und Raumfahrt) is an organization whose purpose is to coordinate Austrian space exploration-related activities, both national programs and European Space Agency related programs.  It was established in 1972 in Vienna.  In 1987, Austria became a member state of the European Space Agency. NASA Astronaut Group 9 was announced on May 29, 1980, and completed their training by 1981.  This group, composed of 19 candidates, was selected to supplement the 35 astronauts that had been selected in 1978, and marked the first time that non-Americans were trained as mission specialists with the selections of ESA astronauts Claude Nicollier and Wubbo Ockels.  In keeping with the previous group, astronaut candidates were divided into pilots and mission specialists, with eight pilots, eleven mission specialists, and two international mission specialists within the group. The State Space Agency of Ukraine (SSAU; Ukrainian: Державне космічне агентство України , "Derzhavne kosmichne ahentstvo Ukrayiny", ДКАУ, "DKAU") is the Ukrainian government agency responsible for space policy and programs.  Along with the Ukrainian Defense Industry and the Antonov Aeronautical Scientific-Technical Complex, it is a major state complex of the national defense industry of Ukraine.  The State Space Agency of Ukraine does not specialize in manned astronautical programs.  It is the second of two direct Soviet space program descendants.  The agency does not have its own spaceport and is often dependent on the resources of the Russian Federal Space Agency (the primary inheritor of the Soviet space program). Expedition 31 was the 31st long-duration expedition to the International Space Station (ISS).  It began on 27 April 2012 with the departure from the ISS of the Soyuz TMA-22 spacecraft, which returned the Expedition 30 crew to Earth.  The expedition ended on 1 July 2012, when crew members Oleg Kononenko, André Kuipers and Don Pettit departed from the ISS aboard Soyuz TMA-03M, marking the beginning of Expedition 32. 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. Soyuz TMA-4 was a Soyuz mission to the International Space Station (ISS) launched by a Soyuz FG launch vehicle.  It was launched on April 19, 2004 (UTC) from Baikonur Cosmodrome.  Gennady Padalka from Russia, Michael Fincke from the USA and André Kuipers from the Netherlands were flown to the International Space Station.  Kuipers returned to Earth 9 days later together with ISS crew 8 with the re-entry module of the Soyuz TMA-3, the other two stayed as ISS crew 9.  The craft landed October 24, 2004 with Padalka, Fincke and Yuri Shargin aboard. The Ghana Space Science and Technology Centre (GSSTC) was opened officially on 2 May 2012 as Ghana’s first space science, space exploration, astronomy and technology space agency.  GSSTC and Ghana Space Agency (GhSA) aims to become an arena of excellence in space science, space exploration and space technology through teaching, learning, private spaceflight and space research commercialisation.  The centre and space agency will also allow scientists and astronauts to conduct research into natural resource management, weather forecasting, agriculture and national security.
Answer: ESA