Question: What airlines are part of the SkyTeam alliance?
SPARQL:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX dbp: <http://dbpedia.org/property/> 
PREFIX dbo: <http://dbpedia.org/ontology/> 
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT DISTINCT ?uri 
WHERE {
          ?uri rdf:type dbo:Airline .
        { ?uri dbp:alliance res:SkyTeam . }
        UNION
        { ?uri dbo:Alliance res:SkyTeam . }
}