Question: what episode does holly come back to the office
[{'answer': "`` Classy Christmas ''"}, {'provenance': [{'wikipedia_id': '17500842', 'title': 'Holly Flax', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 494, 'bleu_score': 0.9792717993254391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3575049283078359468}, 'section': 'Section::::Character history.:Season 7.\n'}]}]