Question: NGC 1808 is a Seyfert galaxy located in the constellation Columba, The which astronomical event that occurs during the last stellar evolutionary stages of a massive star's life, whose dramatic and catastrophic destruction is marked by one final titanic explosion, 1993af appeared in NGC 1808?
{'answer': 'Supernova', 'supporting_facts': [['NGC 1808', 1], ['Supernova', 0]]}