Complex sentence: Founded by S. S. McClure and John Sanborn Phillips (1861-1949), fellow classmate of Knox College, in June 1893, the magazine featured political and literary content, plus serialized novels-in-progress, a chapter at a time.
Split into simpler sentences: Founded by S. S. McClure and John Sanborn Phillips (1861-1949), fellow classmate of Knox College, in June 1893, the magazine featured political and literary content. It published serialized novels-in-progress, a chapter at a time.