# filename: ex135.rq

PREFIX ab: <http://learningsparql.com/ns/addressbook#>
PREFIX dc: <http://purl.org/dc/elements/1.1/> 

SELECT ?graph ?email
FROM <ex134.ttl> 
FROM NAMED <ex125.ttl>
FROM NAMED <ex122.ttl> 
WHERE
{
  ?graph dc:date "2011-09-24" . 
  { GRAPH ?graph { ?s ab:email ?email } }
}