Question: when did the giant kangaroo rat become endangered
[{'answer': 'in the 1980s', 'provenance': [{'wikipedia_id': '514866', 'title': 'Giant kangaroo rat', 'start_paragraph_id': 10, 'start_character': 85, 'end_paragraph_id': 10, 'end_character': 97, 'bleu_score': 1.0, 'section': 'Section::::Habitat.\n'}]}, {'provenance': [{'wikipedia_id': '514866', 'title': 'Giant kangaroo rat', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 1043, 'bleu_score': 0.9881300380564421, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10592099164380907606}, 'section': 'Section::::Habitat.\n'}]}]