What is the {holding company} for {chief executive officer} of {Warren Buffett}
What is the name of Warren Buffet's company?
 select distinct ?sbj where { ?sbj wdt:P169 wd:Q47213 . ?sbj wdt:P31 wd:Q219577 } 
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P169> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q47213> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q219577> } 
What is the title of Warren Buffet's company?