what is the {start time} for {Kuomintang} has {chairperson} as {Wu Den-yih} ?
During what time period did Wu Den-yih serve as the chairperson of Kuomintang?
When was Wu Den-yih the chairperson of Kuomintang?
SELECT ?a WHERE { ?j property:chairperson resource:Wu_Den-yih . ?j property:start_time ?a . resource:Kuomintang property:chairperson ?j }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q31113> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P488> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q57838> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q31113 p:P488 ?s . ?s ps:P488 wd:Q57838 . ?s pq:P580 ?value}