question: What actress played Marty's girlfriend in the first Back to the Future movie but not the second?
answerText: Claudia Wells
questionEntity.name: Q2338941
questionEntity.entityType: entity
questionEntity.label: Marty McFly
questionEntity.mention: Marty's
questionEntity.name: Q91540
questionEntity.entityType: entity
questionEntity.label: Back to the Future
questionEntity.mention: Back to the Future
questionEntity.name: 1
questionEntity.entityType: ordinal
questionEntity.mention: first
questionEntity.name: 2
questionEntity.entityType: ordinal
questionEntity.mention: second
answerEntity.name: Q51125
answerEntity.label: Claudia Wells