Complex sentence: The Nyborg chapter specialises in longsword, rapier, and poleaxe, and the primary source for the Guild's longsword interpretations comes from Claus Sørensen, a researcher based in Nyborg Castle.
Split into simpler sentences: The Nyborg chapter specialises in longsword, rapier, and poleaxe. Indeed, longsword interpretation is led by Claus Sørensen, a researcher based in Nyborg Castle.