content/tutorials/sparql_data/q-union1.rq

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

SELECT ?name
WHERE
{
    { [] foaf:name ?name } UNION { [] vCard:FN ?name }
}