@prefix owl: <http://www.w3.org/2002/07/owl#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd:  <http://www.w3.org/2001/XMLSchema#>.
@prefix : <foo://bla#> .
:kate :name "Kate"; :age 62; :hasChild :john.
:john :name "John"; :age 35; :hasChild [:name "Alice"], [:name "Bob"; :age 8].
:hasChild rdfs:domain :Person; rdfs:range :Person.
:age a owl:FunctionalProperty; a owl:DatatypeProperty; rdfs:range xsd:int.
:name a owl:FunctionalProperty; a owl:DatatypeProperty; rdfs:range xsd:string.
:atLeast18T owl:equivalentClass
  [a rdfs:Datatype; owl:onDatatype xsd:int; owl:withRestrictions ( _:x1 )].
_:x1 xsd:minInclusive 18 .
:Adult owl:intersectionOf (:Person
  [ a owl:Restriction;
    owl:onProperty :age;
    owl:someValuesFrom :atLeast18T]).
:Child owl:intersectionOf (:Person
  [ owl:complementOf :Adult ]).