PREFIX  xsd:    <http://www.w3.org/2001/XMLSchema#>
PREFIX  dc:     <http://purl.org/dc/elements/1.1/>
PREFIX  :       <.>

SELECT ?date ?title
{ 
  ?g dc:date ?date . FILTER (?date > "2005-08-01T00:00:00Z"^^xsd:dateTime )
  GRAPH ?g 
      { ?b dc:title ?title }
}