# Comments

PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
prefix email: <http://davide.eynard.it/rdf/email#>

select * 
where{
	?x email:subject	?subj1 .
	?x email:server		"server1" .
	?x email:folder		"Sent" .
	?y email:subject	?subj1 .
	?y email:server		"server3" .
}