Question: when does the world cup of hockey start
[{'answer': '2020', 'provenance': [{'wikipedia_id': '263861', 'title': 'World Cup of Hockey', 'start_paragraph_id': 1, 'start_character': 477, 'end_paragraph_id': 1, 'end_character': 481, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '263861', 'title': 'World Cup of Hockey', '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': 8247725786610343593}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '263861', 'title': 'World Cup of Hockey', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['2020', 'The World Cup of Hockey is an international ice hockey tournament. Inaugurated in 1996, it is the successor to the Canada Cup, which ran from 1976 to 1991 and was the first international hockey championship to allow nations to field their top players.']}}]}, {'provenance': [{'wikipedia_id': '263861', 'title': 'World Cup of Hockey', 'section': 'Section::::History.:World Cup of Hockey.\n', 'start_paragraph_id': 10, 'end_paragraph_id': 10, 'meta': {'evidence_span': ['2020', 'The 2020 edition was planned to include a European qualification tournament to determine some participating nations']}}]}]