question: What is a main game in the Metal Gear Solid series and has Raiden as the main playable character?
answerText: Metal Gear Solid 2
questionEntity.name: Q2007514
questionEntity.entityType: entity
questionEntity.label: Raiden
questionEntity.mention: Raiden
questionEntity.name: Q6582527
questionEntity.entityType: entity
questionEntity.label: Metal Gear Solid
questionEntity.mention: Metal Gear Solid
answerEntity.name: Q907226
answerEntity.label: Metal Gear Solid 2: Sons of Liberty