Complex sentence: In the early 1970s, Bel Geddes underwent a radical mastectomy, an experience she relived in the 1979-80 season of "Dallas"; this was the storyline that earned her the Emmy Award.
Split into simpler sentences: In the early 1970s, Bel Geddes underwent a radical mastectomy, an experience she relived in the 1979-80 season of "Dallas". This was the storyline that earned her the Emmy Award.