Question: what is the average age for a midlife crisis
[{'answer': '45 -- 64 years'}, {'provenance': [{'wikipedia_id': '1142439', 'title': 'Midlife crisis', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 479, 'bleu_score': 0.9073361345830181, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6546747835457837218}, 'section': 'Section::::Abstract.'}]}]