```json
{
  "claims": [
    {
      "claim": "Aortic root dilation occurs in 60-80% of adults with Marfan syndrome.",
      "quote": "Aortic root dilation | 60-80% of adults",
      "subject": "Aortic root dilation",
      "predicate": "occurs in",
      "object": "adults with Marfan syndrome",
      "negated": false,
      "qualifier": null,
      "subject_qualifier": null,
      "object_qualifier": "60-80%",
      "entities": ["Aortic root dilation", "Marfan syndrome", "adults"],
      "citations": [],
      "about": "domain",
      "basis": "background_knowledge"
    },
    {
      "claim": "Ectopia lentis occurs in about 60% of people with Marfan syndrome.",
      "quote": "Ectopia lentis | about 60%",
      "subject": "Ectopia lentis",
      "predicate": "occurs in",
      "object": "people with Marfan syndrome",
      "negated": false,
      "qualifier": "about",
      "subject_qualifier": null,
      "object_qualifier": "about 60%",
      "entities": ["Ectopia lentis", "Marfan syndrome"],
      "citations": [],
      "about": "domain",
      "basis": "background_knowledge"
    },
    {
      "claim": "Aortic dissection is the leading cause of death in Marfan syndrome.",
      "quote": "Aortic dissection is the leading cause of death",
      "subject": "Aortic dissection",
      "predicate": "is the leading cause of death in",
      "object": "Marfan syndrome",
      "negated": false,
      "qualifier": null,
      "subject_qualifier": null,
      "object_qualifier": null,
      "entities": ["Aortic dissection", "Marfan syndrome", "death"],
      "citations": [],
      "about": "domain",
      "basis": "background_knowledge"
    }
  ]
}
```