What is {number of out of school children} of {Cambodia} that is {point in time} is {2003-1-1} ?
How many children were out of school on 1/1/03 in Cambodia?
What was Cambodia number of out of school children in 2003-1-1?
SELECT ?o WHERE { resource:Cambodia property:number_of_out-of-school_children ?t . ?t property:number_of_out-of-school_children ?o . FILTER ( CONTAINS ( YEAR ( ?x ) , '2003' ) ) . ?t property:point_in_time ?x }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q424> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2573> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P585> <2003-1-1>
} 

SELECT ?obj WHERE { wd:Q424 p:P2573 ?s . ?s ps:P2573 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'2003')) }