Question: when does the anterior fontanelle close in babies
[{'answer': 'by 9 to 18 months', 'provenance': [{'wikipedia_id': '197438', 'title': 'Fontanelle', 'start_paragraph_id': 8, 'start_character': 218, 'end_paragraph_id': 8, 'end_character': 235, 'bleu_score': 1.0, 'section': 'Section::::Structure.\n'}]}, {'provenance': [{'wikipedia_id': '197438', 'title': 'Fontanelle', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 507, 'bleu_score': 0.9757530668325981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10521564413412612012}, 'section': 'Section::::Structure.\n'}]}]