<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.foro3d.com/f113/juego-3d-mymahj-4-1d-divertido-mahjong-3d-con-varios-niveles-de-dificultad-77785.html>