Question: when was lou seal first introduced as the giants mascot
[{'answer': 'July 25 , 1996', 'provenance': [{'wikipedia_id': '855375', 'title': 'List of Major League Baseball mascots', 'start_paragraph_id': 43, 'start_character': 71, 'end_paragraph_id': 43, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::Current mascots.:Lou Seal (San Francisco Giants).\n'}]}, {'provenance': [{'wikipedia_id': '855375', 'title': 'List of Major League Baseball mascots', 'start_paragraph_id': 43, 'start_character': 0, 'end_paragraph_id': 43, 'end_character': 530, 'bleu_score': 0.9385289250847371, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 467782592737669333}, 'section': 'Section::::Current mascots.:Lou Seal (San Francisco Giants).\n'}]}]