[{
  "@type": ["ex:Outer"],
  "ex:nested": [{
    "@type": ["ex:Inner"],
    "ex:foo": [
      {"@value": "1"},
      {"@type": "ex:Number", "@value": "2"}
    ],
    "ex:bar": [
      {"@id": "http://example/a"},
      {"@id": "http://example/b"}
    ]
  }]
}]