Get term direct sub-classes with labels by introducing a SNOMED term

Database: 
Statement: 

Get term direct sub-classes with label introducing as SNOMED example $term$ (e.g.363664003) </br> A limit of results per page $number$ (e.g. 10)

Query: 
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX snomed-term: <http://purl.bioontology.org/ontology/SNOMEDCT/> PREFIX skos: <http://www.w3.org/2004/02/skos/core#> SELECT DISTINCT ?x ?label FROM <http://bioportal.bioontology.org/ontologies/SNOMEDCT> WHERE { ?x rdfs:subClassOf snomed-term:??term . ?x skos:prefLabel ?label. } limit ??number