Question: who has won the most stanley cups in a row
[{'answer': 'Toronto Maple Leafs', 'provenance': [{'wikipedia_id': '1486684', 'title': 'List of Stanley Cup champions', 'start_paragraph_id': 50, 'start_character': 45, 'end_paragraph_id': 50, 'end_character': 64, 'bleu_score': 1.0, 'section': 'Section::::Appearances.:Stanley Cup Finals era (since 1915).:Defunct teams.\n'}]}]