@prefix dc:   <http://purl.org/dc/elements/1.1/> .
@prefix :     <http://example.org/book/> .
@prefix ns:   <http://example.org/ns#> .

{
  :book1  dc:title  "SPARQL Tutorial" .
  :book1  ns:price  42 .
}

:graph {
  :book2  dc:title  "The Semantic Web" .
  :book2  ns:price  23 
}