Question: what type of energy is stored in a capacitor
[{'answer': 'electrical', 'provenance': [{'wikipedia_id': '4932111', 'title': 'Capacitor', 'start_paragraph_id': 1, 'start_character': 71, 'end_paragraph_id': 1, 'end_character': 81, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4932111', 'title': 'Capacitor', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 375, 'bleu_score': 0.9250392488272071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4024583915438972731}, 'section': 'Section::::Abstract.'}]}]