About: http://webisa.webdatacommons.org/448124405

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	And from Jacobson's book mentioned above there is a corollary Here I consider the corollary as Any projective graded R-module for $R=F[x_1,x_2,...,x_m]$ is free.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com