question: How many United States presidents served in the American Civil War?
answerText: 7
questionEntity.name: Q30
questionEntity.entityType: entity
questionEntity.label: United States of America
questionEntity.mention: United States
questionEntity.name: Q8676
questionEntity.entityType: entity
questionEntity.label: American Civil War
questionEntity.mention: American Civil War
answerEntity.name: Q35041
answerEntity.label: William McKinley
answerEntity.name: Q35678
answerEntity.label: Benjamin Harrison
answerEntity.name: Q35498
answerEntity.label: Chester A. Arthur
answerEntity.name: Q34597
answerEntity.label: James A. Garfield
answerEntity.name: Q35686
answerEntity.label: Rutherford B. Hayes
answerEntity.name: Q34836
answerEntity.label: Ulysses S Grant
answerEntity.name: Q8612
answerEntity.label: Andrew Johnson