Question: when was the first solid body electric guitar made
[{'answer': '1931', 'provenance': [{'wikipedia_id': '4679954', 'title': 'Solid body', 'start_paragraph_id': 25, 'start_character': 120, 'end_paragraph_id': 25, 'end_character': 124, 'bleu_score': 1.0, 'section': 'Section::::History.:Commercial models.\n'}]}, {'provenance': [{'wikipedia_id': '4679954', 'title': 'Solid body', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 366, 'bleu_score': 0.965203995518735, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6885522848566880947}, 'section': 'Section::::History.:Commercial models.\n'}]}]