What is the {human} for {producer} of {The Birth of a Nation}
Name the person who led to the production of The Birth of a Nation
 select distinct ?obj where { wd:Q220394 wdt:P162 ?obj . ?obj wdt:P31 wd:Q5 } 
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q220394> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P162> . ?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/Q5> } 
Title the individual who driven to the generation of The Birth of a Nation