Question: what type of circuit is used to tune a radio
[{'answer': 'a resonant circuit', 'provenance': [{'wikipedia_id': '903897', 'title': 'Tuner (radio)', 'start_paragraph_id': 5, 'start_character': 149, 'end_paragraph_id': 5, 'end_character': 167, 'bleu_score': 1.0, 'section': 'Section::::Design.\n'}]}, {'provenance': [{'wikipedia_id': '903897', 'title': 'Tuner (radio)', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 374, 'bleu_score': 0.96746874041754, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10241235560322037670}, 'section': 'Section::::Design.\n'}]}]