Distinct(Project(Filter((?feature != <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>) && (?feature != <http://example.org/sold>),
                        BGP( ?product <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/item> .
                             ?product2 ?feature ?featureValue)),
                 {?product, ?feature, ?featureValue}))