Complex sentence: They said that many sites published graphs showing a rising trend of organ transplantation since 1999, after Falun Gong was banned, and that many stated that organs could be found "immediately".
Split into simpler sentences: They said that many sites published graphs showing a rising trend of organ transplantation since 1999, after Falun Gong was banned. In addition, many such websites stated that the organs could be found "immediately".