Question: the type of electrical current in which electrons flow first in one direction then in the other is
[{'answer': 'alternating', 'provenance': [{'wikipedia_id': '6207', 'title': 'Electric current', 'start_paragraph_id': 18, 'start_character': 3, 'end_paragraph_id': 18, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Alternating and direct current.\n'}]}, {'provenance': [{'wikipedia_id': '6207', 'title': 'Electric current', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 533, 'bleu_score': 0.9754554449993441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9606938137025969771}, 'section': 'Section::::Alternating and direct current.\n'}]}]