Question: When did Gordon S. Clinton start and finish his role as the head of government for Seattle?
Paraphrase: When did Gordon S. Clinton begin and end his role as Seattle's head of government?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q5083 p:P6 ?s . ?s ps:P6 wd:Q5585769 . ?s pq:P2031 ?value1 . ?s pq:P2032 ?value2 }