Question: Did the highest selling album of Judas Priest release before or after the one produced by Roy Z?
{'answer': 'after', 'supporting_facts': [['Angel of Retribution', 0], ['Angel of Retribution', 2], ['Angel of Retribution', 3], ['Redeemer of Souls', 0], ['Redeemer of Souls', 1], ['Redeemer of Souls', 2]]}