Complex sentence: Juncker was a leader in the Pietist reform movement as applied to medicine, directing the Francke Foundations and initiating approaches to medical practice, charitable treatment, and education at the University of Halle that influenced others world-wide.
Split into simpler sentences: Juncker was a leader in the Pietist reform movement as it applied to medicine. He directed the Francke Foundations and initiated approaches to medical practice, charitable treatment, and education at the University of Halle that influenced others world-wide.