Question: when was the first electric bass guitar made
[{'answer': 'the 1930s', 'provenance': [{'wikipedia_id': '3916', 'title': 'Bass guitar', 'start_paragraph_id': 9, 'start_character': 3, 'end_paragraph_id': 9, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::History.:1930s–1940s.\n'}]}]