protocol question

In example 10, http://w3c.github.io/web-annotation/protocol/wd/

Example 10
HTTP/1.1 201 CREATED
Content-Type: application/ld+json
ETag: "_87e52ce126126"
Location: http://example.org/annotations/anno1
Allow: PUT,GET,OPTIONS,HEAD,DELETE,PATCH
Content-Length: 246

{
  "@context": "http://www.w3.org/ns/oa",
  "@id": "http://example.org/annotations/anno1",
  "@type": "oa:Annotation",
  "annotatedAt": "2015-01-31T12:03:45Z",
  "bodyValue": "I like this page!",
  "target": http://www.example.com/index.html

}

The annotation uses a literal body "I like this page!".

I don't see an example where the body is a resource.  Could you give an example of this (or if there is one and I am missing it please point me to it), because I am not clear about the behavior in that case.

Thanks.

Ray