Complex sentence: She was first taught the violin by her mother, Setsu Gotō, who discovered her daughter's innate musicality at the age of two, when she found Midori humming a Bach theme she had rehearsed a few days earlier.
Split into simpler sentences: She was first taught the violin by her mother, Setsu Gotō. Her mother discovered her daughter's innate musicality at the age of two, when she found Midori humming a Bach theme she had rehearsed a few days earlier.