such as 뒤에 절이 올 수 있나요?

“Thus from a closer and purer alliance of the two faculties, the experimental and the rational — such as has never yet been made — we have a good reason for hope.”
such as 뒤에는 명사구만 오는 줄 알았는데, 여기서는 어떤 구조인지 궁금해요.