What is {position held} of {Zbigniew Brzezinski} that is {start time} is {1977-1-20} ?
What position did Zbigniew Brezzinski hold on 1977-1-20?
What was Zbigniew Brezzinski's position in 1977-1-20?
SELECT ?v WHERE { ?w property:start_time ?f . ?w property:position_held ?v . FILTER ( CONTAINS ( YEAR ( ?f ) , '1977' ) ) . resource:Zbigniew_Brzezinski property:position_held ?w }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q168041> .
?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> <1977-1-20>
} 

SELECT ?obj WHERE { wd:Q168041 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1977')) }