What is {academic degree} of {Mary Leakey} that is {point in time} is {1968-0-0} ?
In 1968, what academic degree did Mary Leakey receive?
What academic degree if Mary Leakey earn in 1968?
SELECT ?g WHERE { ?l property:academic_degree ?g . ?l property:point_in_time ?l . resource:Mary_Douglas_Leakey property:academic_degree ?l . FILTER ( CONTAINS ( YEAR ( ?l ) , '1968' ) ) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q231111> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P512> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P585> <1968-0-0>
} 

SELECT ?obj WHERE { wd:Q231111 p:P512 ?s . ?s ps:P512 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1968')) }