Question: who was the first band to play at woodstock
[{'answer': 'Richie Havens', 'provenance': [{'wikipedia_id': '23972861', 'title': 'List of performances and events at Woodstock Festival', 'start_paragraph_id': 3, 'start_character': 49, 'end_paragraph_id': 3, 'end_character': 62, 'bleu_score': 1.0, 'section': 'Section::::Friday, August 15 to Saturday, August 16.\n'}]}, {'provenance': [{'wikipedia_id': '23972861', 'title': 'List of performances and events at Woodstock Festival', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 189, 'bleu_score': 0.8283995163558051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2022596194351015559}, 'section': 'Section::::Friday, August 15 to Saturday, August 16.\n'}]}]