d3js-v4-egghead/data/data.json

[
  {
    "age": 23,
    "name": "Welch"
  },
  {
    "age": 38,
    "name": "Villareal"
  },
  {
    "age": 13,
    "name": "Sheryl"
  },
  {
    "age": 37,
    "name": "Marshall"
  },
  {
    "age": 37,
    "name": "Aimee"
  }
]