SELECT DISTINCT ?instance ?instanceType WHERE {
    ?instance emf:instanceType "objectinstance" .
    ?instance emf:isDeleted "false"^^xsd:boolean .
    ?instance a emf:ClassDescription.
    ?instance emf:isPartOfObjectLibrary "true"^^xsd:boolean.
    OPTIONAL{
        ?instance dcterms:title ?title .
        FILTER(LANG(?searchTitle) = ?LANG)
    }
    OPTIONAL {
        ?instance dcterms:title ?title_en .
        FILTER(LANG(?title_en) = "en")
    }
    BIND(IF(BOUND(?title), LCASE(?title), LCASE(?title_en)) AS ?title_)
} ORDER BY ?title_