Complex sentence: Horch studied at Northwestern University in Chicago, U.S. with Frederick Hemke, after which he won a BP North America Scholarship to pursue post-graduate study at the Guildhall School of Music and Drama with Stephen Trier.
Split into simpler sentences: Horch studied at Northwestern University in Chicago, U.S. with Frederick Hemke. He then won a BP North America Scholarship to pursue post-graduate study at the Guildhall School of Music and Drama with Stephen Trier.