Question: which astronomical bodies emit light in the visible spectrum
[{'answer': 'Emission nebulae', 'provenance': [{'wikipedia_id': '273679', 'title': 'Astronomical spectroscopy', 'start_paragraph_id': 33, 'start_character': 454, 'end_paragraph_id': 33, 'end_character': 470, 'bleu_score': 1.0, 'section': 'Section::::Interstellar medium.\n'}]}, {'provenance': [{'wikipedia_id': '273679', 'title': 'Astronomical spectroscopy', 'start_paragraph_id': 33, 'start_character': 0, 'end_paragraph_id': 33, 'end_character': 545, 'bleu_score': 0.9754554449993441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11376891579345259309}, 'section': 'Section::::Interstellar medium.\n'}]}]