Question: when did the amazon river dolphin become endangered
[{'answer': '2008', 'provenance': [{'wikipedia_id': '168053', 'title': 'Amazon river dolphin', 'start_paragraph_id': 4, 'start_character': 3, 'end_paragraph_id': 4, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '168053', 'title': 'Amazon river dolphin', 'start_paragraph_id': 56, 'start_character': 0, 'end_paragraph_id': 56, 'end_character': 553, 'bleu_score': 0.9470882598755391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13861332471154683065}, 'section': 'Section::::Interactions with humans.:Conservation.\n'}]}]