Complex sentence: She eventually came to the attention of Arthur Baldwin Turnure, founding editor of the magazine, who was responsible for her ascent up the corporate ladder and made her a consultant regarding the direction of the magazine, eventually giving Chase control over the magazine's layout.
Split into simpler sentences: She eventually came to the attention of Arthur Turnure, founding editor of the magazine, who was responsible for her ascent up the corporate ladder. He made her a consultant regarding the direction of the magazine, eventually giving Chase control over the magazine's layout.