Complex sentence: Introduced in season eleven is Dr. Nicole Herman (Geena Davis) who is Chief of Fetal Surgery at Grey Sloan Memorial, she mentors Arizona Robbins in a fetal surgery fellowship, Herman plays in a twelve episode arc before departing after episode fourteen.
Split into simpler sentences: Introduced in season eleven is Dr. Nicole Herman (Geena Davis), who is Chief of Fetal Surgery at Grey Sloan Memorial. Dr. Herman mentors Arizona Robbins in a fetal surgery fellowship, and plays in a twelve episode arc before departing after episode fourteen.