Complex sentence: Minivirus has been placed into a viral family by the International Committee on Taxonomy of Viruses as a member of the "Mimiviridae", and has been placed into Group I of the Baltimore classification system.
Split into simpler sentences: Minivirus has been placed into a viral family by the International Committee on Taxonomy of Viruses as a member of the "Mimiviridae". It has however, been placed into Group I of the Baltimore classification system.