Question: who won the american league pennant in 2017
[{'answer': 'Houston Astros', 'provenance': [{'wikipedia_id': '53770152', 'title': '2017 American League Championship Series', 'start_paragraph_id': 1, 'start_character': 85, 'end_paragraph_id': 1, 'end_character': 99, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the Houston Astros', 'provenance': [{'wikipedia_id': '53770152', 'title': '2017 American League Championship Series', 'start_paragraph_id': 1, 'start_character': 81, 'end_paragraph_id': 1, 'end_character': 99, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '53770152', 'title': '2017 American League Championship Series', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 353, 'bleu_score': 0.968982777549629, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11137495346227622202}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '53770152', 'title': '2017 American League Championship Series', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['The Astros defeated the Yankees in 7 games after falling behind 3 games to 2', 'The 2017 American League Championship Series was a best-of-seven playoff pitting the Houston Astros against the New York Yankees for the American League pennant and the right to face the Los Angeles Dodgers in the 2017 World Series', 'The Astros defeated the Yankees in 7 games after falling behind 3 games to 2.']}}]}]