Complex sentence: In Great Britain, it is normally described as a conservatory, although the room may not contain plants, however a British sunroom has a solid opaque roof whereas a conservatory has a transparent or semi-transparent roof.
Split into simpler sentences: In Great Britain, it is normally described as a conservatory, although the room may not contain plants. However a British sunroom has a solid opaque roof whereas a conservatory has a transparent or semi-transparent roof.