Complex sentence: The goals of the institution were to teach the Adventists' version of holistic medicine, which stressed the importance of temperance and preventative medicine, taking in visitors and advocating the use of Graham bread and counseling eight hours of sleep at night.
Split into simpler sentences: The goals of this institution where to teach the Adventists version of holistic medicine, which detail the importance of temperance and preventative medicine. Taking in visitors and advocating the use of Graham bread and counseling eight hours of sleep at night.