Complex sentence: A "notification group" consisted of 155 Level 3 ("high public risk") sex offenders, and this group was subject to broad community notification after release from Minnesota prisons between 1997 and 2002.
Split into simpler sentences: A "notification group" consisted of 155 Level 3 ("high public risk") sex offenders. This group was subject to broad community notification after release from Minnesota prisons between 1997 and 2002.