Complex sentence: The Planetree Alliance is a nonprofit organization of hospitals and other health-care institutions which states its goal is to improve patient care through "patient-oriented" practices that it says make patients less intimidated by institutions and medical care.
Split into simpler sentences: The Planetree Alliance is a nonprofit organization of hospitals and other health-care institutions. It states its goal is to improve patient care through "patient-oriented" practices that it says make patients less intimidated by institutions and medical care.