Complex sentence: The former Weimar Sanitarium is now Weimar Institute, home to the NewStart health program, Weimar College, and the Weimar Academy, a boarding school for high school students, both run by the Seventh-day Adventist Church.
Split into simpler sentences: The former Weimar Sanitarium is now Weimar Institute, home to the NewStart health program. The Institute also includes Weimar College, and Weimar Academy, a boarding school for high school students, both run by the Seventh-day Adventist Church.