Question: In which teams have league members of the Czech Extraliga played previously?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/league> <http://dbpedia.org/resource/Czech_Extraliga> . ?x <http://dbpedia.org/ontology/formerTeam> ?uri  . }
Answer: The former teams of the league members of Czech Extraliga are [answer].