[{
 "@type": ["http://example/Outer"],
 "http://example/base-foo": [{"@value": "base-foo"}],
 "http://example/outer-prop": [{
   "@type": ["http://example/Inner"],
   "http://example/prop": [{
     "@id": "http://example/inner-with-index",
     "@index": "index",
     "http://example/inner-foo": [{"@value": "inner-foo"}]
   }]
 }]
}]