Task: Question Generation
Input (English): Context : The Karaiskakis Stadium disaster was an incident that occurred on 8 February 1981, in the Karaiskakis Stadium in Neo Faliro, Piraeus, Greece, after the conclusion of a football match between Olympiacos and AEK Athens. 
Answer : 8 February 1981
Output (English): When did Karaiskakis Stadium disaster occur?