question: Was Barack Obama a U.S. senator previous to becoming U.S. president?
answerText: Yes
questionEntity.name: Q11696
questionEntity.entityType: entity
questionEntity.label: President of the United States
questionEntity.mention: U.S. president
questionEntity.name: Q76
questionEntity.entityType: entity
questionEntity.label: Barack Obama
questionEntity.mention: Barack Obama
questionEntity.name: Q7863481
questionEntity.entityType: entity
questionEntity.label: U.S. senator bibliography
questionEntity.mention: U.S. senator