Question: when was christmas first celebrated as a holiday
[{'answer': '336', 'provenance': [{'wikipedia_id': '6237', 'title': 'Christmas', 'start_paragraph_id': 14, 'start_character': 402, 'end_paragraph_id': 14, 'end_character': 405, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'answer': 'early - to - mid fourth century'}, {'provenance': [{'wikipedia_id': '6237', 'title': 'Christmas', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 755, 'bleu_score': 0.582927216288838, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14303980648349694835}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6237', 'title': 'Christmas', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14303980648349694835}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6237', 'title': 'Christmas', 'section': 'Section::::History.:Introduction of feast.\n', 'start_paragraph_id': 17, 'end_paragraph_id': 17, 'meta': {'evidence_span': ['The Chronography of 354 records that a Christmas celebration took place in Rome in 336.', 'Arnobius wrote after AD 297. The Chronography of 354 records that a Christmas celebration took place in Rome in 336. In the East, the birth of Jesus was celebrated in connection with the Epiphany on January 6. This holiday was not primarily about the nativity, but rather the baptism of Jesus.', 'The Chronography of 354 records that a Christmas celebration took place in Rome in 336.']}}]}, {'provenance': [{'wikipedia_id': '6237', 'title': 'Christmas', 'section': 'Section::::History.\n', 'start_paragraph_id': 14, 'end_paragraph_id': 14, 'meta': {'evidence_span': ['The Romans marked the winter solstice on December 25. The first recorded Christmas celebration was in Rome on December 25, 336.', 'The first recorded Christmas celebration was in Rome on December 25, 336. Christmas played a role in the Arian controversy of the fourth century. After this controversy was played out, the prominence of the holiday declined.', 'The first recorded Christmas celebration was in Rome on December 25, 336.']}}]}]