What is {position held} of {Harold Wilson} that is {end time} is {1974-2-8} ?
On February 8, 1974, what position did Harold Wilson hold?
SELECT ?obj WHERE { wd:Q128956 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P582 ?x filter(contains(YEAR(?x),'1974')) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q128956> .
?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/P582> <1974-2-8>
} 

What position was Harold Wilson in, on February 8, 1974?