Question: who has won the 2016 australian open men's single title
[{'answer': 'Novak Djokovic', 'provenance': [{'wikipedia_id': '48592843', 'title': "2016 Australian Open – Men's Singles", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '48592843', 'title': "2016 Australian Open – Men's Singles", 'start_paragraph_id': 1, 'start_character': 15, 'end_paragraph_id': 1, 'end_character': 542, 'bleu_score': 0.7739838572211961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15944640892940366073}, 'section': 'Section::::Abstract.'}]}]