Question: when was the last time nsw won all 3 games
[{'answer': '2000', 'provenance': [{'wikipedia_id': '1954843', 'title': 'State of Origin series', 'start_paragraph_id': 41, 'start_character': 11, 'end_paragraph_id': 41, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::History.:1990s.\n'}]}]