Question: when is the champions league round of 16 draws
[{'answer': '11 December 2017', 'provenance': [{'wikipedia_id': '54326297', 'title': '2017–18 UEFA Champions League knockout phase', 'start_paragraph_id': 15, 'start_character': 41, 'end_paragraph_id': 15, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Round of 16.\n'}]}]