what is the {start time} for {Naha} has {twinned administrative body} as {Fuzhou} ?
When were Naha and Fuzhou twinned?
When was Naha twinned with Fuzhou?
SELECT ?k WHERE { ?z property:twinned_administrative_body resource:Fuzhou . resource:Naha property:twinned_administrative_body ?z . ?z property:start_time ?k }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q181966> .
?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/Q68481> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q181966 p:P190 ?s . ?s ps:P190 wd:Q68481 . ?s pq:P580 ?value}