Question: who has won the world series two years in a row
[{'answer': 'New York Yankees', 'provenance': [{'wikipedia_id': '29404777', 'title': 'List of Major League Baseball franchise postseason streaks', 'start_paragraph_id': 2, 'start_character': 58, 'end_paragraph_id': 2, 'end_character': 74, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Oakland Athletics', 'provenance': [{'wikipedia_id': '29404777', 'title': 'List of Major League Baseball franchise postseason streaks', 'start_paragraph_id': 2, 'start_character': 512, 'end_paragraph_id': 2, 'end_character': 529, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29404777', 'title': 'List of Major League Baseball franchise postseason streaks', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 770, 'bleu_score': 0.9854535765681661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12576789358014937081}, 'section': 'Section::::Abstract.'}]}]