Complex sentence: The official booklet provided summaries of past expositions for most of the alleged authors, some of which matched those of known artists, e.g. Austria's "Sabrina Unterberger"'s résumé apparently belonged to Ernst Logar.
Split into simpler sentences: The official booklet provided summaries of past expositions for most of the alleged authors, some of which matched those of known artists. For example, Austria's "Sabrina Unterberger" had a résumé that apparently belonged to Ernst Logar.