About: http://webisa.webdatacommons.org/95063414

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	The language and system of proof (by means of tableaux, i.e. trees) are those to be found in W. Hodges, Logic, 2nd edition (Penguin, 2001).
http://www.w3.org/ns/prov#wasQuotedFrom	ox.ac.uk