question: How many members form the original BSC in the Baby-Sitters Club books by Ann M. Martin?
answerText: 4
questionEntity.name: Q3108867
questionEntity.entityType: entity
questionEntity.label: The Baby-Sitters Club
questionEntity.mention: BSC
questionEntity.name: Q1446683
questionEntity.entityType: entity
questionEntity.label: Ann M. Martin
questionEntity.mention: Ann M. Martin
questionEntity.name: Q3108867
questionEntity.entityType: entity
questionEntity.label: The Baby-Sitters Club
questionEntity.mention: the Baby-Sitters Club