@prefix ps: <http://www.wikidata.org/prop/statement/> .
@prefix wds: <http://www.wikidata.org/entity/statement/> .
@prefix wikibase: <http://wikiba.se/ontology#> .

wds:P8206-a1459863-4e2e-cc95-8514-8d64acda2f2d a wikibase:BestRank ;
    wikibase:rank wikibase:NormalRank ;
    ps:P1793 "^(G.S.R.|S.R.O.|S.O.)\\s(\\d)*(\\s|\\s\\S((E)\\S)\\s)dated\\s([1-9]|[12][0-9]|3[01])\\s(January|February|March|April|May|June|July|August|September|October|November|December)\\s\\d{4}$" .