question: What river is the 2nd longest river in the U.S. and flows to the Gulf of Mexico?
answerText: Mississippi River
questionEntity.name: Q12630
questionEntity.entityType: entity
questionEntity.label: Gulf of Mexico
questionEntity.mention: Gulf of Mexico
questionEntity.name: Q30
questionEntity.entityType: entity
questionEntity.label: United States of America
questionEntity.mention: U.S.
questionEntity.name: 2
questionEntity.entityType: ordinal
questionEntity.mention: 2nd
answerEntity.name: Q1497
answerEntity.label: Mississippi River