<https://blog.epal.vn/diem-khac-biet-giua-surface-pro-2017-va-surface-pro-4/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.epal.vn/diem-khac-biet-giua-surface-pro-2017-va-surface-pro-4/>