what is the {start time} for {Eindhoven} has {twinned administrative body} as {Białystok} ?
On what date was Eindhoven twinned with Bialystok?
When was Eindhoven twinned with Bialystok?
SELECT ?l WHERE { resource:Eindhoven property:twinned_administrative_body ?c . ?c property:twinned_administrative_body resource:Białystok . ?c property:start_time ?l }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q9832> .
?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/Q761> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q9832 p:P190 ?s . ?s ps:P190 wd:Q761 . ?s pq:P580 ?value}