What is {member of} of {Marguerite Yourcenar} that is {start time} is {1980-3-6} ?
Since March 6th, 1980, who is a member of Marguerite Yourcenar?
Who is member of Marguerite Yourcenar since 1980-3-6?
SELECT ?k WHERE { ?n property:start_time ?s . resource:Marguerite_Yourcenar property:member_of ?n . ?n property:member_of ?k . FILTER ( CONTAINS ( YEAR ( ?s ) , '1980' ) ) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q163118> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P463> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1980-3-6>
} 

SELECT ?obj WHERE { wd:Q163118 p:P463 ?s . ?s ps:P463 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1980')) }