what is the {start time} for {Erfurt} has {twinned administrative body} as {Kalisz} ?
erfurt and kalisz began their admininistrative duties when?
when did erfurt and kalisz begin their administrative responsibilities?
SELECT ?l WHERE { ?w property:start_time ?l . resource:Erfurt property:twinned_administrative_body ?w . ?w property:twinned_administrative_body resource:Kalisz }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1729> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P190> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q52842> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q1729 p:P190 ?s . ?s ps:P190 wd:Q52842 . ?s pq:P580 ?value}