Shurley also noted that Genie's was the most severe case of isolation he had ever studied or heard about--which he maintained more than 20 years later--and offered several suggestions about how to work with her.
Genie's was the most severe case of isolation--which he maintained more than 20 years later --. This was what Shurley noted. He had ever studied or heard about isolation. Shurley also offered several suggestions about how to work with her.