Question: When did Dresden start being located in the administrative territorial entity of the Dresden Government Region?
Paraphrase: When was Dresden first deemed to be located in the administrative territorial entity of the Dresden Government Region?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q1731 p:P131 ?s . ?s ps:P131 wd:Q24174 . ?s pq:P580 ?value}