What is {position held} of {Boutros Boutros-Ghali} that is {start time} is {1992-1-1} ?
What was the job of Boutros-Ghali in 1992?
What position was held by Boutros Boutros-Ghali in 1992?
SELECT ?a WHERE { ?l property:start_time ?v . ?l property:position_held ?a . FILTER ( CONTAINS ( YEAR ( ?v ) , '1992' ) ) . resource:Boutros_Boutros-Ghali property:position_held ?l }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1257> .
?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> <1992-1-1>
} 

SELECT ?obj WHERE { wd:Q1257 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1992')) }