What is the {type of sport} for {competition class} of {curling}
Which is the type of sport that has curling as competition class?
 select distinct ?obj where { wd:Q136851 wdt:P2094 ?obj . ?obj wdt:P31 wd:Q31629 } 
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q136851> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2094> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q31629> } 
In what sport is curling a competition class?