What is {significant event} of {Edgar Mitchell} that is {point in time} is {1971-2-0} ?
What important event happened to Edgar Muchell at 1971-07-01?
What is the important event of Edgar Michell at the time of 1971-7-01?
SELECT ?q WHERE { ?w property:significant_event ?q . ?w property:point_in_time ?b . FILTER ( CONTAINS ( YEAR ( ?b ) , '1971' ) ) . resource:Edgar_Mitchell property:significant_event ?w }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q295873> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P793> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P585> <1971-2-0>
} 

SELECT ?obj WHERE { wd:Q295873 p:P793 ?s . ?s ps:P793 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1971')) }