Question: what gene or chromosome is affected by edwards syndrome
[{'answer': 'chromosome 18', 'provenance': [{'wikipedia_id': '435802', 'title': 'Edwards syndrome', 'start_paragraph_id': 1, 'start_character': 107, 'end_paragraph_id': 1, 'end_character': 120, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '435802', 'title': 'Edwards syndrome', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 334, 'bleu_score': 0.863251085368631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12647720772304733396}, 'section': 'Section::::Abstract.'}]}]