# Generated with http://eulersharp.sourceforge.net/ version 1.4.28 on 31 Jan 2006 10:30:24 GMT @prefix log: . @prefix e: . (!log:semantics !log:semantics)!log:conjunction => { @prefix str: . @prefix p0: . @prefix q: . @prefix e: . @prefix xsd: . @prefix : . @prefix log: . @prefix rdfs: . @prefix owl: . @prefix rdf: . {{:husband rdfs:subPropertyOf :spouse} e:evidence . {{:firstHusband rdfs:subPropertyOf :husband} e:evidence . {:Mary :firstHusband :Dan} e:evidence } => { {:Mary :husband :Dan} e:evidence }} => { {:Mary :spouse :Dan} e:evidence }. # Proof found in 4 steps (400000 steps/sec) using 1 engine (60 triples) }.