What is {position held} of {Nicolae Ceaușescu} that is {start time} is {1967-12-9} ?
What position did Nicolae Ceausescu hold on December, 1967?
What position did Nicolae Ceaușescu hold starting on the 9th of December, 1967?
SELECT ?u WHERE { ?l property:start_time ?r . ?l property:position_held ?u . resource:Nicolae_Ceaușescu property:position_held ?l . FILTER ( CONTAINS ( YEAR ( ?r ) , '1967' ) ) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q80504> .
?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> <1967-12-9>
} 

SELECT ?obj WHERE { wd:Q80504 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1967')) }