Question: who did fernando tatis hit 2 grand slams off of
[{'answer': 'Chan Ho Park', 'provenance': [{'wikipedia_id': '2429154', 'title': 'Fernando Tatís', 'start_paragraph_id': 4, 'start_character': 368, 'end_paragraph_id': 4, 'end_character': 380, 'bleu_score': 1.0, 'section': 'Section::::Playing career.\n'}]}, {'provenance': [{'wikipedia_id': '2429154', 'title': 'Fernando Tatís', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 515, 'bleu_score': 0.8531281241079731, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12981367344653515412}, 'section': 'Section::::Playing career.\n'}]}]