<http://schema.org/mpn>
"PSP3503DUOBLUE       "^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.mironet.cz/prestigio-multiphone-wize-3503-duo-cz-5quot-quadcore-12-ghz-512mb-ram-4gb-dual-sim-android-44-modra+dp246302/>