Complex sentence: Shasta Publishers was a science fiction and fantasy small press specialty publishing house founded in 1947 by Erle Melvin Korshak, T. E. Dikty, and Mark Reinsberg, who were all science fiction fans from the Chicago area.
Split into simpler sentences: Shasta Publishers was a science fiction and fantasy small press specialty publishing house founded in 1947. It was founded by Erle Melvin Korshak, T. E. Dikty, and Mark Reinsberg who were all science fiction fans from the Chicago area.