{
  "@context": {
    "foo_ltr": {"@id": "http://example.com/foo", "@container": "@list", "@direction": "ltr"},
    "foo_rtl": {"@id": "http://example.com/foo", "@container": "@list", "@direction": "rtl"}
  },
  "foo_ltr": ["en"],
  "foo_rtl": ["ar"]
}