Question: what day of the week was april 6 1968
[{'answer': 'Sa', 'provenance': [{'wikipedia_id': '11095824', 'title': 'April 1968', 'start_paragraph_id': 5, 'start_character': 283, 'end_paragraph_id': 5, 'end_character': 285, 'bleu_score': 1.0, 'section': 'Section::::April 1, 1968 (Monday).\n'}]}]