[{
  "@id": "_:b0",
  "http://example.com/foo": [{"@list": [
    {"@list": [{"@id": "http://example/a"}]},
    {"@id": "http://example/b"}
  ]}]
},
{
  "@id": "http://example/a",
  "@type": [
    "http://example/Bar"
  ]
},
{
  "@id": "http://example/b",
  "@type": [
    "http://example/Baz"
  ]
}]