Complex sentence: The Western Infirmary opened as a voluntary hospital relying upon donations and bequests from members of the public, but in 1948 with the introduction of the National Health Service the Western came under the management of the Glasgow Western Hospitals Board of Management.
Split into simpler sentences: The Western Infirmary opened as a voluntary hospital relying upon donations and bequests from members of the public. In 1948 with the introduction of the National Health Service the Western came under the management of the Glasgow Western Hospitals Board of Management.