Question: Who was the retired American astronaut who transferred from Expedition 44 to 45 on the International Space Station?

full_context: Document 1: Soyuz TMA-18M: Soyuz TMA-18M was a 2015 Soyuz spaceflight to the International Space Station. It provided the two twelve-months occupants (Scott Kelly and Mikhail Korniyenko) at the International Space Station with a fresh Soyuz capsule. TMA-18M was the 127th flight of a Soyuz spacecraft; the first having occurred in 1967. The ascent flight consisted of a Russian commander and two flight engineers from Denmark (ESA) and Kazakhstan respectively. The flight launched in September 2015 and returned to Earth in March 2016.
Document 2: Richard Mastracchio: Richard Alan "Rick" Mastracchio (born February 11, 1960) is an American engineer and former NASA astronaut. He has flown on three NASA Space Shuttle missions as a mission specialist in addition to serving as a Flight Engineer on the Soyuz TMA-11M (Expedition 38/Expedition 39) long duration mission aboard the International Space Station. He is currently the Senior Director of Operations for Commercial Resupply Services at Orbital ATK.
Document 3: Jay Greene: Jay H. Greene is a retired NASA engineer. Between 2000 and 2004, he served as Chief Engineer at Johnson Space Center, where his role consisted primarily of advising the Center Director. He worked as a FIDO flight controller during the Apollo Program and a flight director from 1982 to 1986, most notably as ascent flight director during the Challenger accident in 1986. Greene worked for four years as a manager on the International Space Station project and received several awards for his work including the NASA Distinguished Service Medal. After his retirement in 2004 he served as a part-time consultant on the Exploration Systems Architecture Study. NASA Associate Administrator Rex Geveden described him as "a famous technical curmudgeon in the Agency."
Document 4: Soyuz TMA-17M: Soyuz TMA-17M was a 2015 flight to the International Space Station. It transported three members of the Expedition 44 crew to the International Space Station. TMA-17M was the 126th flight of a Soyuz spacecraft; the first having occurred in 1967. The crew consisted of a Russian commander accompanied by Japanese and American astronauts. The capsule remained docked to the space station for about five months until the scheduled departure of Expedition 45 in December 2015. Soyuz TMA-17M landed safely on the steppes of Kazakhstan on 11 December, 2015, in a rare night landing.
Document 5: Timothy Kopra: Timothy Lennart Kopra (born April 9, 1963) is an engineer, a Colonel in the United States Army, a NASA astronaut, and the former commander of the International Space Station. He served aboard the International Space Station as a flight engineer for Expedition 20, returning to Earth aboard Space Shuttle "Discovery" on the STS-128 mission on September 11, 2009.
Document 6: Soyuz 18: Soyuz 18 (Russian: Союз 18 , "Union 18") was a 1975 Soviet manned mission to Salyut 4, the second and final crew to man the space station. Pyotr Klimuk and Vitali Sevastyanov set a new Soviet space endurance record of 63 days and the mark for most people in space simultaneously (seven) was tied during the mission.
Document 7: Scott Kelly (astronaut): Scott Joseph Kelly (born February 21, 1964 in Orange, New Jersey) is an engineer, retired American astronaut, and a retired U.S. Navy Captain. A veteran of four space flights, Kelly commanded the International Space Station (ISS) on Expeditions 26, 45, and 46.
Document 8: Michael Barratt (astronaut): Michael Reed Barratt (born April 16, 1959) is an American physician and a NASA astronaut. Specializing in aerospace medicine, Barratt served as a flight surgeon for NASA before his selection as an astronaut, and has played a role in developing NASA's space medicine programs for both the Shuttle-Mir Program and International Space Station. His first spaceflight was a long-duration mission to the International Space Station, as a Flight Engineer in the Expedition 19 and 20 crew. In March 2011, Barratt completed his second spaceflight as a crew member of STS-133.
Document 9: Soyuz TMA-19: Soyuz TMA-19 was a manned spaceflight to the International Space Station and is part of the Soyuz programme. It was launched June 15, 2010 carrying three members of the Expedition 24 crew to the International Space Station, who remained aboard the station for around six months. TMA-19 was the 106th manned flight of a Soyuz spacecraft, since the first mission which was launched in 1967. The spacecraft remained docked to the space station for the remainder of Expedition 24, and for Expedition 25, to serve as an emergency escape vehicle. It undocked from ISS and landed in Kazakhstan on the November 26, 2010. It was the 100th mission to be conducted as part of the International Space Station programme since assembly began in 1998.
Document 10: Peggy Whitson: Peggy Annette Whitson (born February 9, 1960) is an American biochemistry researcher, NASA astronaut, and former NASA Chief Astronaut. Her first space mission was in 2002, with an extended stay aboard the International Space Station as a member of Expedition 5. Her second mission launched October 10, 2007, as the first woman commander of the ISS with Expedition 16. She was currently in space on her third long-duration space flight and was the commander of the International Space Station for Expedition 51, before handing over command to Fyodor Yurchikhin on June 1, 2017.
Document 11: Expedition 45: Expedition 45 was the 45th expedition to the International Space Station. Scott Kelly and Mikhail Korniyenko transferred from Expedition 44 as part of their year-long stay aboard the ISS. Expedition 45 began with the arrival of Soyuz TMA-18M at the ISS on September 11, 2015, and concluded with the departure of Soyuz TMA-17M on December 11 2015. Kelly, Korniyenko and Sergey Volkov then transferred to the crew of Expedition 46.
Document 12: Expedition 31: 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.
Document 13: Jerry M. Linenger: Jerry Michael Linenger (born January 16, 1955) is a retired Captain in the United States Navy Medical Corps, and a former NASA astronaut who flew on the Space Shuttle and Space Station Mir.
Document 14: Expedition 26: Expedition 26 was the 26th long-duration mission to the International Space Station. The expedition's first three crew members – one US astronaut and two Russian cosmonauts – arrived at the station on board Soyuz TMA-01M on 10 October 2010. Expedition 26 officially began the following month on 26 November, when half of the crew of the previous mission, Expedition 25, returned to Earth on board Soyuz TMA-19. The rest of the Expedition 26 crew – one US astronaut, one Russian cosmonaut and one ESA astronaut – joined the trio already on board when their spacecraft, Soyuz TMA-20, docked with the station on 17 December 2010.
Document 15: Expedition 35: Expedition 35 was the 35th long-duration mission to the International Space Station (ISS). The expedition started 13 March 2013, and marked the first time a Canadian astronaut – Colonel Chris Hadfield – was in command of the station. Expedition 35 was also only the second time an ISS crew is led by neither a NASA astronaut, nor a Roscosmos cosmonaut, after Expedition 21 in 2009, when ESA astronaut Frank De Winne was in command.
ground_truth: Scott Kelly