Question: the supply in glower is ac or dc
[{'answer': 'AC current'}, {'provenance': [{'wikipedia_id': '4135179', 'title': 'Growler (electrical device)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 438, 'bleu_score': 0.944475589384524, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17075871181027361759}, 'section': 'Section::::Abstract.'}]}]