Question: in 1991 what country declared great while sharks a legally protected species
[{'answer': 'South Africa', 'provenance': [{'wikipedia_id': '24644173', 'title': 'Shark sanctuary', 'start_paragraph_id': 18, 'start_character': 8, 'end_paragraph_id': 18, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::National and international status.:Africa.\n'}]}, {'provenance': [{'wikipedia_id': '24644173', 'title': 'Shark sanctuary', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 116, 'bleu_score': 0.9021315316859231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3365216935273933602}, 'section': 'Section::::National and international status.:Africa.\n'}]}]