what is the {start time} for {Beijing} has {twinned administrative body} as {New York City} ?
When did Beijing become a double administrative body like New York City?
When was Beijing begin a double administrative body just like New York City?
SELECT ?v WHERE { ?j property:start_time ?v . ?j property:twinned_administrative_body resource:New_York_City . resource:Beijing property:twinned_administrative_body ?j }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q956> .
?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/Q60> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q956 p:P190 ?s . ?s ps:P190 wd:Q60 . ?s pq:P580 ?value}