question: How many astronauts have walked on the moon as of 2020?
answerText: 12
questionEntity.name: Q11631
questionEntity.entityType: entity
questionEntity.label: astronaut
questionEntity.mention: astronauts
questionEntity.name: Q405
questionEntity.entityType: entity
questionEntity.label: Moon
questionEntity.mention: moon
questionEntity.name: 2020
questionEntity.entityType: date
questionEntity.mention: 2020
answerEntity.name: Q1615
answerEntity.label: Neil Armstrong
answerEntity.name: Q158486
answerEntity.label: Eugene Cernan
answerEntity.name: Q112284
answerEntity.label: Charles Duke
answerEntity.name: Q174979
answerEntity.label: Alan Shepard
answerEntity.name: Q310924
answerEntity.label: Alan Bean