<http://schema.org/telephone>
"+48-12-312-03-20"^^<http://www.w3.org/2001/XMLSchema#string>
<http://lovebooks.pl/9783126757867/M-Erfolog-zum-Deutsch--Test-fur-Zuwanderer-A2-B1-Ubungs--und-Testbuch-2CD.html>