Complex sentence: In 1859 Griesinger became head of an institution for mentally handicapped children in the small town of Mariaberg, and in 1860 participated in the planning of the Burghölzli Mental Hospital in Zurich.
Split into simpler sentences: In 1859 Griesinger became head of an institution for mentally handicapped children in the small town of Mariaberg. In 1860 he participated in the planning of the Burghölzli Mental Hospital in Zurich.