Complex sentence: On April 6, the Associated Press reported that her cancer had metastasized to her liver, a development Fawcett had learned of in May 2007 and which her subsequent treatments in Germany had targeted.
Split into simpler sentences: On April 6, the Associated Press reported that the cancer had metastasized to her liver. This was a development that Fawcett had learned of in May 2007 and which her subsequent treatments in Germany had targeted.