Complex sentence: GCR Class 8M was similar and in 1922 the GCR rebuilt two Class 8M to Class 8K, taking the 131 locomotives, which the LNER Classified as part of its LNER Class O4.
Split into simpler sentences: GCR Class 8M was similar and in 1922 the GCR rebuilt two Class 8M to Class 8K, taking the total to 131 locomotives. The London and North Eastern Railway (LNER) classified the 8K as part of its LNER Class O4.