what is the {start time} for {Dresden} has {located in the administrative territorial entity} as {Dresden Government Region} ?
When was Dresden first deemed to be located in the administrative territorial entity of the Dresden Government Region?
When did Dresden start being located in the administrative territorial entity of the Dresden Government Region?
SELECT ?g WHERE { ?x property:start_time ?g . resource:Dresden property:located_in_the_administrative_territorial_entity ?x . ?x property:located_in_the_administrative_territorial_entity resource:Dresden_Government_Region }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1731> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P131> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q24174> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q1731 p:P131 ?s . ?s ps:P131 wd:Q24174 . ?s pq:P580 ?value}