question: Which Foundation series book by Issac Asimov have been released in 1990's?
answerText: Forward the Foundation
questionEntity.name: Q34981
questionEntity.entityType: entity
questionEntity.label: Isaac Asimov
questionEntity.mention: Issac Asimov
questionEntity.name: Q1564644
questionEntity.entityType: entity
questionEntity.label: Foundation series
questionEntity.mention: Foundation series
questionEntity.name: 1990
questionEntity.entityType: date
questionEntity.mention: 1990
answerEntity.name: Q938629
answerEntity.label: Forward the Foundation