what is the {start time} for {Innsbruck} has {twinned administrative body} as {Kraków} ?
When was Innsbruck paired with Kraków?
When was Innsbruck twinned with Kraków?
SELECT ?r WHERE { ?m property:start_time ?r . resource:Innsbruck property:twinned_administrative_body ?m . ?m property:twinned_administrative_body resource:Kraków }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1735> .
?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/Q31487> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q1735 p:P190 ?s . ?s ps:P190 wd:Q31487 . ?s pq:P580 ?value}