Viking Orbiter

Target entity: Viking Orbiter
Context triple: [Valles Marineris, studiedByMission, Viking Orbiter]

• A. 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.
• B. 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.
• C. Mariner 9
  Mariner 9 was a NASA robotic spacecraft that became the first artificial satellite of Mars, revolutionizing our understanding of the planet’s surface and atmosphere in the early 1970s.
• D. Venera 9
  Venera 9 was a Soviet spacecraft that became the first human-made probe to successfully return images from the surface of Venus.
• E. Venera 6
  Venera 6 was a Soviet space probe launched in 1969 to study the atmosphere of Venus during its descent.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Viking Orbiter
Target entity description: Viking Orbiter was a pair of NASA spacecraft launched in the 1970s that orbited Mars to map its surface, study its atmosphere, and support the Viking landers.

• A. 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.
• B. 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.
• C. Mariner 9
  Mariner 9 was a NASA robotic spacecraft that became the first artificial satellite of Mars, revolutionizing our understanding of the planet’s surface and atmosphere in the early 1970s.
• D. Venera 9
  Venera 9 was a Soviet spacecraft that became the first human-made probe to successfully return images from the surface of Venus.
• E. Venera 6
  Venera 6 was a Soviet space probe launched in 1969 to study the atmosphere of Venus during its descent.
• F. None of above. chosen