Complex sentence: Horn did work with Yes again, not as a band member, but (co-) producing their next two studio albums, including the 1983 "comeback" album "90125", and also went on to be a founding member of the Art of Noise.
Split into simpler sentences: Horn did work with Yes again, not as a band member, but (co-) producing their next two studio albums, including the 1983 "comeback" album "90125". He also went on to be a founding member of the Art of Noise.