Sikorsky S-43

Target entity: Sikorsky S-43
Context triple: [Wright R-1820, usedOnAircraft, Sikorsky S-43]

• A. Sikorsky S‑40
  The Sikorsky S‑40 was an early 1930s American amphibious flying boat airliner used primarily by Pan American Airways for long-range overwater routes.
• B. Sikorsky S‑38
  The Sikorsky S‑38 was a twin‑engine amphibious flying boat of the late 1920s and early 1930s, used for both commercial and exploratory aviation and noted for its distinctive twin‑boom tail.
• C. Sikorsky R-4
  The Sikorsky R-4 was the world’s first mass-produced helicopter and the first helicopter to be used operationally by the U.S. military during World War II.
• D. Bell H-13 Sioux
  The Bell H-13 Sioux is a light, single-rotor helicopter best known for its extensive use by the U.S. Army during the Korean War, particularly in medical evacuation and observation roles.
• E. Sikorsky VS-300
  The Sikorsky VS-300 was an early experimental American helicopter that pioneered the single main rotor with tail rotor configuration that became the standard for most modern helicopters.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Sikorsky S-43
Target entity description: The Sikorsky S-43 is a 1930s American twin-engine amphibious flying boat airliner used for passenger and cargo transport over short to medium routes, including by Pan American Airways.

• A. Sikorsky S‑40
  The Sikorsky S‑40 was an early 1930s American amphibious flying boat airliner used primarily by Pan American Airways for long-range overwater routes.
• B. Sikorsky S‑38
  The Sikorsky S‑38 was a twin‑engine amphibious flying boat of the late 1920s and early 1930s, used for both commercial and exploratory aviation and noted for its distinctive twin‑boom tail.
• C. Sikorsky R-4
  The Sikorsky R-4 was the world’s first mass-produced helicopter and the first helicopter to be used operationally by the U.S. military during World War II.
• D. Bell H-13 Sioux
  The Bell H-13 Sioux is a light, single-rotor helicopter best known for its extensive use by the U.S. Army during the Korean War, particularly in medical evacuation and observation roles.
• E. Sikorsky VS-300
  The Sikorsky VS-300 was an early experimental American helicopter that pioneered the single main rotor with tail rotor configuration that became the standard for most modern helicopters.
• F. None of above. chosen