About: http://webisa.webdatacommons.org/156017665

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	It also deals with mental activities to keep your brain young and active, such as solving logic and geometry problems that will surprise one???s intellect and challenge your creativity.
http://www.w3.org/ns/prov#wasQuotedFrom	mahjonged.com