Complex sentence: When fines and arrests failed to have an effect on the community, authorities granted the group the right to operate a private school on the commune's premises, under state supervision; the agreement entailed that the school would not teach sex education and evolution.
Split into simpler sentences: When fines and arrests failed to have an effect on the community, authorities granted the group the right to operate a private school on the commune's premises, under state supervision. The agreement entailed that the school would not teach sex education and evolution.