Complex sentence: The California, Arizona and Santa Fe Railway was a non-operating subsidiary (paper railroad) of Atchison, Topeka and Santa Fe Railway that was incorporated in 1911 and was merged into the ATSF in 1963.
Split into simpler sentences: The California, Arizona and Santa Fe Railway was a non-operating subsidiary (paper railroad) of Atchison, Topeka and Santa Fe Railway (ATSF). It was incorporated in 1911, and was merged into the ATSF in 1963.