Question: when was the last time sunderland were relegated
[{'answer': 'the 1986 -- 87 season'}, {'provenance': [{'wikipedia_id': '18776726', 'title': 'List of Sunderland A.F.C. seasons', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1983, 'bleu_score': 0.8774888549480611, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15032396809234671246}, 'section': 'Section::::Abstract.'}]}]