Complex sentence: Irn-Bru was first launched in 1901, with a separate Diet brand launched in 1991 and the Irn-Bru 32 energy drink variant in 2006.
Split into simpler sentences: Irn-Bru was first launched in 1901. Diet Irn-Bru and the Irn-Bru 32 energy drink variant was launched in 2006.