question: Which of the original Sonic the Hedgehog 2D platformers was not released on the Sega Genesis or Mega Drive?
answerText: Sonic CD
questionEntity.name: Q10676
questionEntity.entityType: entity
questionEntity.label: Sega Mega Drive
questionEntity.mention: Sega Genesis
questionEntity.name: Q1068669
questionEntity.entityType: entity
questionEntity.label: Sonic the Hedgehog
questionEntity.mention: Sonic the Hedgehog 2D
questionEntity.name: Q10676
questionEntity.entityType: entity
questionEntity.label: Sega Mega Drive
questionEntity.mention: Mega Drive
answerEntity.name: Q579708
answerEntity.label: Sonic the Hedgehog CD