Question: when was the last time the knicks won a playoff series
[{'answer': '1972', 'provenance': [{'wikipedia_id': '15679508', 'title': 'List of New York Knicks seasons', 'start_paragraph_id': 2, 'start_character': 680, 'end_paragraph_id': 2, 'end_character': 684, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]