@prefix foaf: .
_:a foaf:name "Johnny Lee Outlaw" .
_:a foaf:mbox .
_:b foaf:name "Peter Goodguy" .
_:b foaf:mbox .
@prefix dc: .
@prefix : .
:book1 dc:title "SPARQL Tutorial" , """PSPARQL language""" ; dc:publisher [] , 1000 , TRUE ; dc:number true , _:b1 , :book2 .
:book2 dc:title """PS""" .