Stephenson valve gear

Target entity: Stephenson valve gear
Context triple: [Walschaerts valve gear, comparedTo, Stephenson valve gear]

• A. Walschaerts
  Walschaerts valve gear is a widely used steam locomotive valve gear mechanism, developed in the 19th century, that precisely controls steam admission and exhaust to the cylinders.
• B. Watt steam engine
  The Watt steam engine was a vastly improved steam engine developed in the late 18th century that greatly increased efficiency and helped power the Industrial Revolution.
• C. Stephenson's Rocket
  Stephenson's Rocket is an early 19th-century steam locomotive famous for winning the 1829 Rainhill Trials and proving the viability of railway transport.
• D. River Don Engine
  The River Don Engine is a historic, high-powered steam engine from Sheffield’s industrial era, renowned for its role in driving heavy steel rolling mills.
• E. James the Red Engine
  James the Red Engine is a bright red mixed-traffic steam locomotive and one of the main anthropomorphic train characters in Rev. W. Awdry’s Railway Series, later popularized by the Thomas & Friends television adaptations.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Stephenson valve gear
Target entity description: Stephenson valve gear is an early and widely used type of steam locomotive valve gear that uses eccentrics mounted on the driving axle to control steam admission and exhaust to the cylinders.

• A. Walschaerts
  Walschaerts valve gear is a widely used steam locomotive valve gear mechanism, developed in the 19th century, that precisely controls steam admission and exhaust to the cylinders.
• B. Watt steam engine
  The Watt steam engine was a vastly improved steam engine developed in the late 18th century that greatly increased efficiency and helped power the Industrial Revolution.
• C. Stephenson's Rocket
  Stephenson's Rocket is an early 19th-century steam locomotive famous for winning the 1829 Rainhill Trials and proving the viability of railway transport.
• D. River Don Engine
  The River Don Engine is a historic, high-powered steam engine from Sheffield’s industrial era, renowned for its role in driving heavy steel rolling mills.
• E. James the Red Engine
  James the Red Engine is a bright red mixed-traffic steam locomotive and one of the main anthropomorphic train characters in Rev. W. Awdry’s Railway Series, later popularized by the Thomas & Friends television adaptations.
• F. None of above. chosen