what is the {end time} for {Uthman ibn Affan} has {position held} as {Rashidun Empire} ?
When Uthman ibn Affan ended as Rashidun Empire?
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select distinct ?value  where {
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?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P39> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q180465> .
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} 

What date was Uthman ibn Affan ended as Rashidun Empire?