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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	Heading a soccer ball, that is, hitting the soccer ball with ones head, is a necessary and useful skill in the game of soccer, particularly since a player is not permitted to use their arms or hands during play of the game.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com