About: http://webisa.webdatacommons.org/77597269

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	I am not sure if you can buy them at time of purchase from Lenovo when configuring online (again, you can probably purchase them when placing your order), but here is a trick:
http://www.w3.org/ns/prov#wasQuotedFrom	superuser.com