question: How many countries have landed spacecraft on the moon?
answerText: 3
questionEntity.name: Q6256
questionEntity.entityType: entity
questionEntity.label: country
questionEntity.mention: countries
questionEntity.name: Q40218
questionEntity.entityType: entity
questionEntity.label: spacecraft
questionEntity.mention: spacecraft
questionEntity.name: Q405
questionEntity.entityType: entity
questionEntity.label: Moon
questionEntity.mention: moon
answerEntity.name: Q30
answerEntity.label: United States of America
answerEntity.name: Q15180
answerEntity.label: Soviet Union
answerEntity.name: Q148
answerEntity.label: People's Republic of China