Question: who is playing in the 2019 winter classic
[{'answer': 'the Chicago Blackhawks', 'provenance': [{'wikipedia_id': '55854244', 'title': '2019 NHL Winter Classic', 'start_paragraph_id': 1, 'start_character': 235, 'end_paragraph_id': 1, 'end_character': 257, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the Boston Bruins', 'provenance': [{'wikipedia_id': '55854244', 'title': '2019 NHL Winter Classic', 'start_paragraph_id': 1, 'start_character': 268, 'end_paragraph_id': 1, 'end_character': 285, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55854244', 'title': '2019 NHL Winter Classic', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 660, 'bleu_score': 0.7317783563468531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 536750899194778018}, 'section': 'Section::::Abstract.'}]}]