Complex sentence: T. (homas) O'Conor Sloane (November 21,1851-August 7,1940) was the editor of "Amazing Stories" from 1929 through 1938; when publisher Ziff-Davis moved production of the magazine to Chicago and named Raymond A. Palmer as Sloane's successor.
Split into simpler sentences: T. (homas) O'Conor Sloane (November 21,1851-August 7,1940) was the editor of "Amazing Stories" from 1929 through 1938. In that year, publisher Ziff-Davis moved production of the magazine to Chicago and named Raymond A. Palmer as Sloane's successor.