Question: when was the first incandescent light bulb invented
[{'answer': '1835', 'provenance': [{'wikipedia_id': '47139', 'title': 'Incandescent light bulb', 'start_paragraph_id': 14, 'start_character': 3, 'end_paragraph_id': 14, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::History.:Early pre-commercial research.\n'}]}, {'provenance': [{'wikipedia_id': '47139', 'title': 'Incandescent light bulb', 'start_paragraph_id': 14, 'start_character': 3, 'end_paragraph_id': 14, 'end_character': 679, 'bleu_score': 0.6313361010386731, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4145514916279174955}, 'section': 'Section::::History.:Early pre-commercial research.\n'}]}]