question: What is the political party of the senator who holds the record for longest uninterrupted time in office?
answerText: Democrat
questionEntity.name: Q7278
questionEntity.entityType: entity
questionEntity.label: political party
questionEntity.mention: political party
questionEntity.name: Q4416090
questionEntity.entityType: entity
questionEntity.label: United States senator
questionEntity.mention: senator
answerEntity.name: Q29552
answerEntity.label: Democratic Party