Complex sentence: In 1938, less than a year after the comic's first issue, the first Dandy Annual was released originally called The Dandy Monster comic this was an annual bumper edition of the comic and has been released annually since then.
Split into simpler sentences: In 1938, less than a year after the comic's debut, the first Dandy Annual was released. Originally called The Dandy Monster comic, this was an annual bumper edition of the comic and has been released yearly since then.