Question: What has been Kanagawa Prefecture's sister body since 1990-4-24?
Paraphrase: On April 24, 1990. what became Kanagawa Prefecture's sister body?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q127513 p:P190 ?s . ?s ps:P190 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1990')) }