Question: who wrote the song jessica by the allman brothers
[{'answer': 'guitarist Dickey Betts', 'provenance': [{'wikipedia_id': '3615516', 'title': 'Jessica (instrumental)', 'start_paragraph_id': 1, 'start_character': 210, 'end_paragraph_id': 1, 'end_character': 232, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3615516', 'title': 'Jessica (instrumental)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 374, 'bleu_score': 0.968982777549629, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3811992593608082894}, 'section': 'Section::::Abstract.'}]}]