Complex sentence: Nowadays, it is said that the original members of the Advanced Chemistry are the pioneers of German HipHop, although another hip hop band called "Die Fantastischen Vier" has dropped two singles and one album on a major label in 1991.
Split into simpler sentences: Nowadays, it is said that the original members of the Advanced Chemistry are the pioneers of German HipHop. Another hip hop band called "Die Fantastischen Vier" could also be seen as pioneers, having dropped two singles and one album on a major label in 1991.