Complex sentence: Including what remained of Leeds United's top class players, as well as emerging youth from their successful academy, which in the past had produced talents such as Alan Smith, Paul Robinson, Jonathan Woodgate and Aaron Lennon.
Split into simpler sentences: Including what remained of Leeds United's top class players, as well as emerging youth from their successful academy. Which in the past had produced talents such as Alan Smith, Paul Robinson, Jonathan Woodgate and Aaron Lennon.