What is {significant event} of {Harrison Schmitt} that is {point in time} is {1972-12-0} ?
In December 1972 Harrison Schmitt was involved in which significant event?
What significant event in December of 1972 involved Harrison Schmitt?
SELECT ?g WHERE { resource:Harrison_Schmitt property:significant_event ?f . FILTER ( CONTAINS ( YEAR ( ?x ) , '1972' ) ) . ?f property:point_in_time ?x . ?f property:significant_event ?g }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q108886> .
?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> <1972-12-0>
} 

SELECT ?obj WHERE { wd:Q108886 p:P793 ?s . ?s ps:P793 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1972')) }