what is the {start time} for {Ashoka} has {position held} as {Mauryan emperor} ?
When did Ashoka hold the position of Mauryan emperor?
SELECT ?value WHERE { wd:Q8589 p:P39 ?s . ?s ps:P39 wd:Q27582039 . ?s pq:P580 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q8589> .
?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/Q27582039> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

At what point did Ashoka continue as Emperor Maurya?