@prefix data: . @prefix : . @prefix foaf: . data:60805616-1c41-314a-ad6c-623feda11196 a :Agent, foaf:Agent ; foaf:homepage "https://theta.obs-besancon.fr/spip.php?article210" . :hasContact data:60805616-1c41-314a-ad6c-623feda11196 .