Example 63 is still hard to understand

[azaroth42]

I know that this was the original example, as submitted, but the use of "fred" as a property rather than a resource makes it more complicated than necessary to see what is going on.

Changing it slightly to follow the previous examples of social networking would help with comprehension:

{
  "@context": {
    "@base": "http://example1.com/",
    "@vocab": "http://example2.com/",
    "knows": {"@type": "@vocab"}
  },
  "knows": [
    {"@id": "barney", "name": "barney"},
    "barney"
  ]
}

And similar through to example 65