Question: what type of mutation is fragile x syndrome
[{'answer': 'FMR1 mutation', 'provenance': [{'wikipedia_id': '53142', 'title': 'Fragile X syndrome', 'start_paragraph_id': 22, 'start_character': 161, 'end_paragraph_id': 22, 'end_character': 174, 'bleu_score': 1.0, 'section': 'Section::::Signs and symptoms.:Autism.\n'}]}, {'provenance': [{'wikipedia_id': '53142', 'title': 'Fragile X syndrome', 'start_paragraph_id': 22, 'start_character': 0, 'end_paragraph_id': 22, 'end_character': 554, 'bleu_score': 0.9505764710553931, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6157981606540862609}, 'section': 'Section::::Signs and symptoms.:Autism.\n'}]}]