Question: how many mlb no hitters have there been
[{'answer': '299'}, {'provenance': [{'wikipedia_id': '2255035', 'title': 'List of Major League Baseball no-hitters', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 310, 'bleu_score': 0.807258730069156, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8337102309240451482}, 'section': 'Section::::Abstract.'}]}]