question: How many Double Dragon games are there for NES?
answerText: 3
questionEntity.name: Q3142082
questionEntity.entityType: entity
questionEntity.label: Double Dragon
questionEntity.mention: Double Dragon
questionEntity.name: Q172742
questionEntity.entityType: entity
questionEntity.label: Nintendo Entertainment System
questionEntity.mention: NES
answerEntity.name: Q698705
answerEntity.label: Double Dragon
answerEntity.name: Q20874773
answerEntity.label: Double Dragon II: The Revenge
answerEntity.name: Q1937488
answerEntity.label: Double Dragon 3: The Rosetta Stone