Question: when did the lions last tour new zealand
[{'answer': '8 July 2017', 'provenance': [{'wikipedia_id': '18929453', 'title': 'History of rugby union matches between New Zealand and the British and Irish Lions', 'start_paragraph_id': 1, 'start_character': 306, 'end_paragraph_id': 1, 'end_character': 317, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]