[
  {
    "title": "Maddison Project Data",
    "author": [
      {
        "given": "Spencer",
        "family": "Graves",
        "role": {},
        "email": {},
        "comment": {}
      }
    ],
    "year": "2025",
    "url": "https://cran.r-project.org/package=MaddisonData"
  }
]