Question: who is the current secretary general of nato
[{'answer': 'Jens Stoltenberg', 'provenance': [{'wikipedia_id': '22194433', 'title': 'Secretary General of NATO', 'start_paragraph_id': 2, 'start_character': 73, 'end_paragraph_id': 2, 'end_character': 89, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '22194433', 'title': 'Secretary General of NATO', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 767, 'bleu_score': 0.713788777641954, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14118122836168515040}, 'section': 'Section::::Abstract.'}]}]