Complex sentence: At 42, Shawn Crahan is the oldest member of Slipknot, and is also known as Slipknot member number 6; being that the eight piece band follows a numbering scheme ranging from 0 to 8.
Split into simpler sentences: At 42, Shawn Crahan is the oldest member of Slipknot. When performing with Slipknot, he is known as number 6; being that the eight piece band follows a numbering scheme ranging from 0 to 8.