question: What is the first Metal Gear game to include Raiden?
answerText: Metal Gear Solid 2: Sons of Liberty
questionEntity.name: Q2007514
questionEntity.entityType: entity
questionEntity.label: Raiden
questionEntity.mention: Raiden
questionEntity.name: Q216655
questionEntity.entityType: entity
questionEntity.label: Metal Gear
questionEntity.mention: Metal Gear
questionEntity.name: 1
questionEntity.entityType: ordinal
questionEntity.mention: first
answerEntity.name: Q907226
answerEntity.label: Metal Gear Solid 2: Sons of Liberty