I think jena employs named graphs as a way to achieve reification. As named graphs can achieve reification by attaching only one statement with named graphs. Is it possible to express information of the following form using named graphs, if yes then can someone please help me write this information using named graphs, so that I may import the same into Jena:
_:a rdf:subject "Mr X". _:a rdf:predicate "isPresident". _:a rdf:object "countryZ". _:a saidBy "Tia". _:a saidOn "29 October 2013". _:a saidAt "New York". _:a confidence 0.9. _:a comment "This is just a comment by Tia". Is it possible to write the corresponding query Jena using named graph query on the above given data?