Question: what day of the week was may 9 1966
[{'answer': 'Mo', 'provenance': [{'wikipedia_id': '42547783', 'title': 'May 1966', 'start_paragraph_id': 3, 'start_character': 136, 'end_paragraph_id': 3, 'end_character': 138, 'bleu_score': 1.0, 'section': 'Section::::May 1, 1966 (Sunday).\n'}]}]