PREFIX a:      <http://www.w3.org/2000/10/annotation-ns#>
PREFIX dc:     <http://purl.org/dc/elements/1.1/>
PREFIX xsd:    <http://www.w3.org/2001/XMLSchema#>

SELECT ?annotates
WHERE { ?annot  a:annotates  ?annotates .
        ?annot  dc:created   ?date .
        FILTER ( ?date = xsd:dateTime("2004-01-01T00:00:00Z") || ?date = xsd:dateTime("2005-01-01T00:00:00Z") ) }