Question: when did new zealand last host the commonwealth games
[{'answer': '1990', 'provenance': [{'wikipedia_id': '16455340', 'title': 'New Zealand at the Commonwealth Games', 'start_paragraph_id': 8, 'start_character': 12, 'end_paragraph_id': 8, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::Host nation.\n'}]}]