Question: who is the boxing world heavyweight champion 2017
[{'answer': 'Manuel Charr', 'provenance': [{'wikipedia_id': '390606', 'title': 'List of heavyweight boxing champions', 'start_paragraph_id': 18, 'start_character': 12, 'end_paragraph_id': 18, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Current status of prominent championship titles.\n'}]}, {'answer': 'Anthony Joshua'}, {'answer': 'Joseph Parker'}]