Question: When did Kanishka become the emperor and when did they finish?
Paraphrase: In what year did Kanishka become emperor, and how long did it last?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q312544 p:P39 ?s . ?s ps:P39 wd:Q39018 . ?s pq:P580 ?value1 . ?s pq:P582 ?value2 }