what is the {of} for {David Koresh} has {given name} as {David} ?
What was David Koresh's given name?
SELECT ?value WHERE { wd:Q431015 p:P735 ?s . ?s ps:P735 wd:Q18057751 . ?s pq:P642 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q431015> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P735> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q18057751> .
?statement <http://www.wikidata.org/entity/P642> ?value. 
} 

Tell me the first name of David Koresh.