Complex sentence: Original JKD is further divided into two points of view, which both hold Wing Chun, Western boxing, and Fencing as the cornerstones of Lee's JKD.
Split into simpler sentences: Original JKD is further divided into two points of view. OJKD and JFJKD both hold Wing Chun, Western Boxing, and Fencing as the cornerstones on Lee's JKD.