Question: When did Bertha Knight Landes take over, and leave as mayor of Seattle?
Paraphrase: When did Bertha Knight Landes take over, and take off as chairman of Seattle?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q5083 p:P6 ?s . ?s ps:P6 wd:Q2899248 . ?s pq:P2032 ?value1 . ?s pq:P2031 ?value2 }