Question: what type of gas is in fluorescent light bulbs
[{'answer': 'mercury - vapor', 'provenance': [{'wikipedia_id': '144056', 'title': 'Fluorescent lamp', 'start_paragraph_id': 159, 'start_character': 791, 'end_paragraph_id': 159, 'end_character': 814, 'bleu_score': 1.0, 'section': 'Section::::Other fluorescent lamps.:Black light.\n'}]}, {'provenance': [{'wikipedia_id': '144056', 'title': 'Fluorescent lamp', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 587, 'bleu_score': 0.9396430371117861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6852795171077767832}, 'section': 'Section::::Abstract.'}]}]