Question: which is the new member of nato in 2017
[{'answer': 'Montenegro', 'provenance': [{'wikipedia_id': '17971449', 'title': 'Member states of NATO', 'start_paragraph_id': 4, 'start_character': 1179, 'end_paragraph_id': 4, 'end_character': 1189, 'bleu_score': 1.0, 'section': 'Section::::Founding and changes in membership.\n'}]}, {'provenance': [{'wikipedia_id': '17971449', 'title': 'Member states of NATO', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 1197, 'bleu_score': 0.9895557778849051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16457108647252535477}, 'section': 'Section::::Founding and changes in membership.\n'}]}]