Complex sentence: SDS developed from the Student League for Industrial Democracy (SLID), the youth branch of a socialist educational organization known as the League for Industrial Democracy (LID) which descended from the Intercollegiate Socialist Society, started in 1905.
Split into simpler sentences: SDS developed from the Student League for Industrial Democracy (SLID), the youth branch of a socialist educational organization known as the League for Industrial Democracy (LID). LID descended from the Intercollegiate Socialist Society, started in 1905.