public static HasPartStatement IsPartOf(this StatementBuilder builder, IConcept whole)
        {
            var statement = new HasPartStatement(null, whole, builder.Subject);

            builder.SemanticNetwork.Statements.Add(statement);
            return(statement);
        }
        public static HasPartStatement HasPart(this StatementBuilder builder, IConcept part)
        {
            var statement = new HasPartStatement(null, builder.Subject, part);

            builder.SemanticNetwork.Statements.Add(statement);
            return(statement);
        }