what is the {start time} for {Wenzhou} has {twinned administrative body} as {Prato} ?
When did wenzhou begin his standpoint in prato
when did Wenzhou start his position in Prato
SELECT ?b WHERE { resource:Wenzhou property:twinned_administrative_body ?u . ?u property:start_time ?b . ?u property:twinned_administrative_body resource:Prato }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q42635> .
?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/Q13377> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q42635 p:P190 ?s . ?s ps:P190 wd:Q13377 . ?s pq:P580 ?value}