Complex sentence: Penny and Aggie is a webcomic written by T Campbell and drawn by Gisèle Lagacé, centered on the two eponymous high school girls, Penny Levac and Aggie d'Amour.
Split into simpler sentences: Penny and Aggie is a webcomic written by T Campbell and drawn by Gisèle Lagacé. It's centered on the two high school girls mentioned in the title, Penny Levac and Aggie d'Amour.