<https://thongtinnhatban.net/threads/nhieu-don-dat-hang-robot-giu-nha-roborior.1422/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://thongtinnhatban.net/threads/nhieu-don-dat-hang-robot-giu-nha-roborior.1422/>