Question: what was the iaf operation in 1999 codenamed
[{'answer': 'Operation Safed Sagar', 'provenance': [{'wikipedia_id': '3872983', 'title': 'Operation Safed Sagar', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3872983', 'title': 'Operation Safed Sagar', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 443, 'bleu_score': 0.7623340247367141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14437658134668333834}, 'section': 'Section::::Abstract.'}]}]