```json
{
  "claims": [
    {
      "claim": "Marfan syndrome is an autosomal dominant disorder.",
      "quote": "Marfan syndrome is an autosomal dominant disorder",
      "subject": "Marfan syndrome",
      "predicate": "is",
      "object": "an autosomal dominant disorder",
      "negated": false,
      "qualifier": null,
      "subject_qualifier": null,
      "object_qualifier": null,
      "entities": ["Marfan syndrome"],
      "citations": [],
      "about": "domain",
      "basis": "background_knowledge"
    },
    {
      "claim": "Marfan syndrome is caused by pathogenic variants in FBN1.",
      "quote": "caused by pathogenic variants in **FBN1**",
      "subject": "Marfan syndrome",
      "predicate": "is caused by",
      "object": "pathogenic variants in FBN1",
      "negated": false,
      "qualifier": null,
      "subject_qualifier": null,
      "object_qualifier": null,
      "entities": ["Marfan syndrome", "FBN1"],
      "citations": ["[1]"],
      "about": "domain",
      "basis": "secondary_source"
    },
    {
      "claim": "Marfan syndrome is not caused by variants in TGFBR2.",
      "quote": "It is not caused by variants in *TGFBR2*",
      "subject": "Marfan syndrome",
      "predicate": "is caused by",
      "object": "variants in TGFBR2",
      "negated": true,
      "qualifier": null,
      "subject_qualifier": null,
      "object_qualifier": null,
      "entities": ["Marfan syndrome", "TGFBR2"],
      "citations": ["[2]"],
      "about": "domain",
      "basis": "secondary_source"
    },
    {
      "claim": "Variants in TGFBR2 cause Loeys-Dietz syndrome.",
      "quote": "variants in *TGFBR2*, which instead cause Loeys-Dietz syndrome",
      "subject": "variants in TGFBR2",
      "predicate": "cause",
      "object": "Loeys-Dietz syndrome",
      "negated": false,
      "qualifier": null,
      "subject_qualifier": null,
      "object_qualifier": null,
      "entities": ["TGFBR2", "Loeys-Dietz syndrome"],
      "citations": ["[2]"],
      "about": "domain",
      "basis": "secondary_source"
    }
  ]
}
```