{"claims": [{"claim": "Beta-blockers may slow aortic root growth in Marfan syndrome.", "quote": "Beta-blockers may slow aortic root growth", "subject": "Beta-blockers", "predicate": "may slow", "object": "aortic root growth", "negated": false, "qualifier": "may", "subject_qualifier": null, "object_qualifier": null, "entities": ["Beta-blockers", "aortic root", "Marfan syndrome"], "citations": ["[3]"], "about": "domain", "basis": "secondary_source"}]}