content/tutorials/sparql_data/q-union1alt.rq

PREFIX  foaf:   <http://xmlns.com/foaf/0.1/>
PREFIX  vCard:  <http://www.w3.org/2001/vcard-rdf/3.0#>

SELECT ?name
WHERE
{
    [] ?p ?name 
    FILTER (?p = foaf:name || ?p = vCard:FN) 
}