What is {position held} of {Helen Clark} that is {start time} is {1981-11-28} ?
Which position did Helen Clark begin on November 28th, 1981?
What position did Helen Clark begin on November 28th, 1981?
SELECT ?o WHERE { resource:Helen_Clark property:position_held ?j . FILTER ( CONTAINS ( YEAR ( ?r ) , '1981' ) ) . ?j property:position_held ?o . ?j property:start_time ?r }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q180383> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P39> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1981-11-28>
} 

SELECT ?obj WHERE { wd:Q180383 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1981')) }