Complex sentence: The Cambridge University Railway Club (CURC) was formed in 1911 and is third oldest railway clubs in the world, after The Railway Club (1899) and the Stephenson Locomotive Society (1909).
Split into simpler sentences: The Cambridge University Railway Club (C.U.R.C.) was formed in 1911 and is one of the oldest railway clubs in the world. It claims to be the third oldest, after The Railway Club (1899) and the Stephenson Locomotive Society (1909).