Question: when was mesh first used for hernia repair
[{'answer': '1999', 'provenance': [{'wikipedia_id': '32295952', 'title': 'Inguinal hernia surgery', 'start_paragraph_id': 42, 'start_character': 60, 'end_paragraph_id': 42, 'end_character': 64, 'bleu_score': 1.0, 'section': 'Section::::Surgical approaches.:Open hernia repair.:Open mesh repairs.\n'}]}, {'provenance': [{'wikipedia_id': '32295952', 'title': 'Inguinal hernia surgery', 'start_paragraph_id': 42, 'start_character': 0, 'end_paragraph_id': 42, 'end_character': 612, 'bleu_score': 0.5744879128190741, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12704256055102653957}, 'section': 'Section::::Surgical approaches.:Open hernia repair.:Open mesh repairs.\n'}]}]