What is {start time} and {end time} of {{Kanishka} has {position held} as {emperor}}
In what year did Kanishka become emperor, and how long did it last?
When did Kanishka become the emperor and when did they finish?
SELECT ?b ?v WHERE { ?h property:position_held resource:Emperor . ?h property:end_time ?v . ?h property:start_time ?b . resource:Kanishka property:position_held ?h }
select distinct ?value1 ?value2 where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q312544> . ?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/Q39018>. ?statement <http://www.wikidata.org/entity/P580> ?value1 . ?statement <http://www.wikidata.org/entity/P2842> ?value2 } 
SELECT ?value1 ?value2 WHERE { wd:Q312544 p:P39 ?s . ?s ps:P39 wd:Q39018 . ?s pq:P580 ?value1 . ?s pq:P582 ?value2 }