so, if the data set is:
@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" .
:book2  dc:title  "The Semantic Web" .
how do i check that the triple :book1  dc:title  "SPARQL Tutorial" . exists?
i can do SELECT ?book where {?book dc:title "SPARQL Tutorial"} but then i have to do post processing to determine if 'book1' was retrieved!
thanks :)