@prefix foaf:       <http://xmlns.com/foaf/0.1/> .
@prefix rdf:        <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs:       <http://www.w3.org/2000/01/rdf-schema#> .
@prefix vcard:      <http://www.w3.org/2001/vcard-rdf/3.0#> .
 
_:a  foaf:name     "Alice" .
_:a  foaf:mbox     <mailto:alice@work.example> .
_:a  vcard:N       _:x .

_:x  vcard:Family  "Hacker" .
_:x  vcard:Given   "Alice" .

_:b  foaf:name     "Bob" .
_:b  foaf:mbox     <mailto:bob@work.example> .
_:b  foaf:N        _:z .

_:z  vcard:Family  "Hacker" .

_:e  foaf:name     "Ella" .
_:e  vcard:N       _:y .

_:y  vcard:Given   "Eleanor" .