Question: what does the ductus arteriosus become following birth
[{'answer': 'the ligamentum arteriosum', 'provenance': [{'wikipedia_id': '712723', 'title': 'Ductus arteriosus', 'start_paragraph_id': 1, 'start_character': 321, 'end_paragraph_id': 1, 'end_character': 346, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '712723', 'title': 'Ductus arteriosus', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 346, 'bleu_score': 0.6616182377799831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13455535242417969408}, 'section': 'Section::::Abstract.'}]}]