Question: when did the south china tiger become endangered
[{'answer': '1996', 'provenance': [{'wikipedia_id': '2101743', 'title': 'South China tiger', 'start_paragraph_id': 1, 'start_character': 234, 'end_paragraph_id': 1, 'end_character': 238, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2101743', 'title': 'South China tiger', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 512, 'bleu_score': 0.66216479766153, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8562380142440580427}, 'section': 'Section::::Abstract.'}]}]