Complex sentence: The Naturopathic College's Doctor of Naturopathic Medicine is a four-year program that trains students to become holistic primary care physicians, while preparing graduates to sit for board examinations in states and provinces that license NDs (naturopathic physicians).
Split into simpler sentences: The Naturopathic College's Doctor of Naturopathic Medicine is a four-year program that trains holistic primary care physicians. In turn, the program prepares graduates to sit for board examinations in states and provinces that license NDs (naturopathic physicians).