Question: when was the last time the red sox had a no-hitter
[{'answer': 'May 19 , 2008', 'provenance': [{'wikipedia_id': '29601954', 'title': 'List of Boston Red Sox no-hitters', 'start_paragraph_id': 3, 'start_character': 442, 'end_paragraph_id': 3, 'end_character': 455, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29601954', 'title': 'List of Boston Red Sox no-hitters', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 454, 'bleu_score': 0.9768747032089851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6142751610587573211}, 'section': 'Section::::Abstract.'}]}]