<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.msxlabs.org/forum/soru-cevap/221437-ilk-20-elementin-adi-simgesi-fiziksel-ve-kimyasal-ozellikleri-nedir-10.html>