Question: Red Bull Stratos was a project involving the skydiver of what nationality?

full_context: Document 1: Hopper balloon: A hopper balloon (simply hopper) is a small, one-person hot air balloon. Unlike a conventional hot air balloon where people ride inside a basket, there is no basket on a hopper balloon. Instead, the hopper pilot usually sits on a seat or wears a harness similar to a parachute harness. Hoppers are typically flown for recreation. These aircraft are sometimes called "Cloud Hoppers" or "Cloudhoppers." However, these terms formally refer to the products of a particular manufacturer, specifically Lindstrand Balloons. Nonetheless, "Cloudhopper" is used by many people as a genericized trademark, which refers to all craft of this general type. Most hopper balloons have envelopes that range in volume from 14000 to and have a maximum flight duration of 1 to 1.5 hours. The two principal commercial balloon manufacturers today offering hopper balloons for sale are Cameron Balloons and Lindstrand Balloons. Most other hopper balloons are experimental aircraft designed and built by amateur constructors.
Document 2: Shital Mahajan: Shital Mahajan Rane, is an Indian extreme sportsperson, skydiver and the holder of five world records and 14 National records in the sport. She is known as the first woman to perform first parachute jump of life without training over the Geographical North pole in minus 37 degree Celsius from 2400 ft, and first accelerated free fall jump without any trials over the Antarctica - South pole from 11,600 feet, in minus 38 degree Celsius the youngest woman to jump over both the North and South Poles, and the first woman jumper to perform it without trials. The Government of India honored Mahajan in 2011, with the fourth highest civilian award of Padma Shri.
Document 3: Mike Melvill: Michael Winston "Mike" Melvill (born November 30, 1940 Johannesburg ) is a world-record-breaking pilot and one of the test pilots for SpaceShipOne, the experimental spaceplane developed by Scaled Composites. Melvill piloted SpaceShipOne on its first flight past the edge of space, flight 15P on June 21, 2004, thus becoming the first commercial astronaut and the 434th person to go into space. He was also the pilot on SpaceShipOne's flight 16P, the first competitive flight in the Ansari X Prize competition.
Document 4: Stratolaunch Systems: Stratolaunch Systems Corporation is a space transportation venture developing a new air launch to orbit system, with its corporate headquarters located in Seattle, Washington. The project was officially announced in December 2011 by Microsoft co-founder Paul G. Allen and Scaled Composites founder Burt Rutan, who had previously collaborated on the creation of SpaceShipOne.
Document 5: Steve Fossett: James Stephen "Steve" Fossett (April 22, 1944 – c. September 3, 2007) was an American businessman and a record-setting aviator, sailor, and adventurer. He was the first person to fly solo nonstop around the world in a balloon. He made his fortune in the financial services industry and was best known for many world records, including five nonstop circumnavigations of the Earth: as a long-distance solo balloonist, as a sailor, and as a solo flight fixed-wing aircraft pilot.
Document 6: Virgin Atlantic GlobalFlyer: The Scaled Composites Model 311 Virgin Atlantic GlobalFlyer (registered N277SF) is an aircraft designed by Burt Rutan in which Steve Fossett flew a solo nonstop airplane flight around the world in 2 days 19 hours and 1 minute (67 hours 1 minute) from February 28 to March 3, 2005. The flight speed of 590.7 kph set the world record for the fastest nonstop non-refueled circumnavigation, beating the mark set by the previous Rutan-designed Voyager aircraft at 9 days 3 minutes and an average speed of 116 mph .
Document 7: Project Excelsior: Project Excelsior was a series of parachute jumps made by Joseph Kittinger of the United States Air Force in 1959 and 1960 from helium balloons in the stratosphere. The purpose was to test the Beaupre multi-stage parachute system intended to be used by pilots ejecting from high altitude. In one of these jumps Kittinger set world records for the highest parachute jump, the longest parachute drogue fall and the fastest speed by a human through the atmosphere. The record for fastest speed by a human through the atmosphere is now held by Felix Baumgartner of the Red Bull Stratos project.
Document 8: Julian Nott (balloonist): Julian Nott is a British balloonist who now lives in Santa Barbara, California, USA. He is known for his achievements in record-setting exploits. Nott has set 79 World ballooning Records and 96 British aviation records and is actively involved in developing balloons for flights at Solar System destinations, particularly Titan. He has flown a working prototype Titan balloon at minus 175 Celsius, approximately the temperature of Titan's atmosphere.
Document 9: Red Bull Stratos: Red Bull Stratos was a space diving project involving Austrian skydiver Felix Baumgartner. On 14 October 2012, Baumgartner flew approximately 39 km into the stratosphere over New Mexico, United States, in a helium balloon before free falling in a pressure suit and then parachuting to Earth. The total jump, from leaving the capsule to landing on the ground, lasted approximately ten minutes. While the free fall was initially expected to last between five and six minutes, Baumgartner deployed his parachute after 4 minutes and 19 seconds.
Document 10: Voskhod 2: Voskhod 2 (Russian: Восход-2 )(English: Sunrise-2) was a Soviet manned space mission in March 1965. The Vostok-based Voskhod 3KD spacecraft with two crew members on board, Pavel Belyayev and Alexey Leonov, was equipped with an inflatable airlock. It established another milestone in space exploration when Alexey Leonov became the first person to leave the spacecraft in a specialized spacesuit to conduct a 12 minute "spacewalk".
Document 11: TopHat (telescope): TopHat was a scientific experiment launched from McMurdo Station in January 2001 to measure the cosmic microwave background radiation produced 300,000 years after the Big Bang. The balloon was launched on January 2, 2001 and proceeded to fly for 644 hours over the continent of Antarctica before landing on January 31, 2001. The balloon flew over the continent 38 kilometers (125,000 ft) above the ground. The working payload was shut down on January 10, 2001 after the liquid cryogens cooling the detectors were exhausted, and the balloon simply circled the continent until it was safe to land. The vorticial winds that typically carry balloons around the continent dissipated part of the way through the flight, and the balloon had to be terminated in a suboptimal location. The landing missed the targeted ice shelf by around one half mile, and while the discs containing the information were recovered safely using a Twin Otter, the gondola itself had not been recovered by August 2001.
Document 12: Chuck Yeager: Charles Elwood "Chuck" Yeager ( ; born February 13 , 1923) is a former United States Air Force general officer and record-setting test pilot. In 1947, he became the first pilot confirmed to have exceeded the speed of sound in level flight.
Document 13: Felix Baumgartner: Felix Baumgartner (] ; born 20 April 1969) is an Austrian skydiver, daredevil and BASE jumper. He is best known for jumping to Earth from a helium balloon in the stratosphere on 14 October 2012. Doing so, he set world records for skydiving an estimated 39 km , reaching an estimated top speed of 1357.64 km/h , or Mach 1.25,
Document 14: André Borschberg: André Borschberg (born December 13, 1952) is a Swiss entrepreneur, explorer, pilot and speaker. He is the co-founder of the Solar Impulse project, the first ever round-the-world solar flight, successfully completed in July 2016. During the Japan-to-Hawaii leg, André broke the world record for longest solo flight in an airplane of any kind: 117 hours and 52 minutes, breaking Steve Fossett's 2006 record. Before that, on 7 July 2010, André completed the first 24-hour solar powered flight. The flight set records for the longest manned solar-powered flight and the greatest height reached by a manned solar aircraft.
Document 15: Michael Gervais: Dr. Michael Gervais (born 1971) is a sport psychologist and entrepreneur, best known for working with the NFL's Seattle Seahawks and being the high performance coach of Austrian skydiver Felix Baumgartner.
ground_truth: Austrian