Question: what is the approximate wavelength range for visible light
[{'answer': '390 to 700 nm'}, {'provenance': [{'wikipedia_id': '41464', 'title': 'Visible spectrum', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 360, 'bleu_score': 0.8361752756163161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2589066275203557997}, 'section': 'Section::::Abstract.'}]}]