```json
{
  "claims": [
    {
      "claim": "About 60 percent of affected people develop ectopia lentis.",
      "quote": "About 60 percent of affected people develop ectopia lentis.",
      "subject": "affected people",
      "predicate": "develop",
      "object": "ectopia lentis",
      "negated": false,
      "qualifier": "about 60 percent",
      "subject_qualifier": null,
      "object_qualifier": null,
      "entities": ["ectopia lentis", "affected people"],
      "citations": [],
      "about": "domain",
      "basis": "background_knowledge"
    }
  ]
}
```