Question: how many baseball teams are in the major league
[{'answer': '30', 'provenance': [{'wikipedia_id': '38776', 'title': 'Major League Baseball', 'start_paragraph_id': 1, 'start_character': 174, 'end_paragraph_id': 1, 'end_character': 176, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '38776', 'title': 'Major League Baseball', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 756, 'bleu_score': 0.9400346272745641, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8895592288480412836}, 'section': 'Section::::Abstract.'}]}]