What is the {landlocked country} with the {MIN(compulsory education (minimum age))} whose {diplomatic relation} is {Serbia}  ?
Which landlocked country that is diplomatically associated with Serbia has the lowest minimum age for mandatory education?
Which landlocked country diplomatically related to Serbia has the lowest minimum age for compulsory education ?
SELECT ?s WHERE { ?s property:compulsory_education_(minimum_age) ?t . ?s property:diplomatic_relation resource:Serbia . . ?s rdf:type ontology:landlocked_country }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q123480>.

?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P3270>.
?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj1.

?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P530> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q403> .

}
ORDER BY ASC(?obj1)
LIMIT 5
select ?ent where { ?ent wdt:P31 wd:Q123480 . ?ent wdt:P3270 ?obj . ?ent wdt:P530 wd:Q403. } ORDER BY ASC(?obj)LIMIT 5 
Hungary Zimbabwe