| http://www.w3.org/ns/prov#value | - In one embodiment, the system, including a database, presents study materials on the subject to the user....http://www.google.com/patents/US6480698?utm_source=gb-gplus-sharePatent US6480698 - Learning method and system based on questioningAdvanced Patent SearchPublication numberUS6480698 B2Publication typeGrantApplication numberUS 09/935,538Publication dateNov 12, 2002Filing dateAug 20, 2001Priori
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