Complex sentence: Billy was in that group but is not anymore one other member who was with them is MC Koma but he left, he said he wants to have a rest from hip-hop he did not say if he will be coming back.
Split into simpler sentences: Billy was in the group but is not anymore one other member who was with them is MC Koma but he also left. He said he wants to have a rest from hip-hop and did not say if he will be coming back.