Vanguard 2

Target entity: Vanguard 2
Context triple: [Vanguard program, launchedSatellite, Vanguard 2]

• A. Vanguard TV3
  Vanguard TV3 was an early U.S. satellite launch attempt in 1957 that failed to reach orbit, becoming a notable setback in the opening phase of the Space Race.
• B. Vanguard rocket
  The Vanguard rocket was an early American expendable launch vehicle developed in the 1950s to place the first U.S. satellites into orbit during the early years of the Space Race.
• C. Viking 2
  Viking 2 was a NASA spacecraft and lander that conducted scientific investigations on the surface of Mars as part of the Viking program in the 1970s.
• D. Cygnus spacecraft
  The Cygnus spacecraft is an uncrewed commercial cargo vehicle developed by Northrop Grumman to deliver supplies and scientific equipment to the International Space Station.
• E. Viking 1
  Viking 1 was a NASA spacecraft that became the first successful lander on Mars, conducting detailed imaging and scientific experiments on the Martian surface starting in 1976.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Vanguard 2
Target entity description: Vanguard 2 is an early American Earth-orbiting satellite, launched in 1959 to measure cloud cover and improve understanding of Earth’s weather and atmospheric conditions.

• A. Vanguard TV3
  Vanguard TV3 was an early U.S. satellite launch attempt in 1957 that failed to reach orbit, becoming a notable setback in the opening phase of the Space Race.
• B. Vanguard rocket
  The Vanguard rocket was an early American expendable launch vehicle developed in the 1950s to place the first U.S. satellites into orbit during the early years of the Space Race.
• C. Viking 2
  Viking 2 was a NASA spacecraft and lander that conducted scientific investigations on the surface of Mars as part of the Viking program in the 1970s.
• D. Cygnus spacecraft
  The Cygnus spacecraft is an uncrewed commercial cargo vehicle developed by Northrop Grumman to deliver supplies and scientific equipment to the International Space Station.
• E. Viking 1
  Viking 1 was a NASA spacecraft that became the first successful lander on Mars, conducting detailed imaging and scientific experiments on the Martian surface starting in 1976.
• F. None of above. chosen