Question: what region of the electromagnetic spectrum is used in nmr spectroscopy
[{'answer': 'radio', 'provenance': [{'wikipedia_id': '1908527', 'title': 'Nuclear magnetic resonance spectroscopy', 'start_paragraph_id': 1, 'start_character': 319, 'end_paragraph_id': 1, 'end_character': 324, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1908527', 'title': 'Nuclear magnetic resonance spectroscopy', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1209, 'bleu_score': 0.9685968214576921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4282627648125311440}, 'section': 'Section::::Abstract.'}]}]