@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix ex: <http://www.exercise2.edu/> .


ex:Jean a foaf:person .
ex:Marie a foaf:person .
ex:Jean ex:Aime ex:Marie .