Complex sentence: In 1998 Sodano intervened to halt an investigation into sexual abuse by the Legion's founder, Marcial Maciel by Joseph Ratzinger, who at the time was head of the Congregation for the Doctrine of the Faith.
Split into simpler sentences: In 1998 Sodano intervened to halt an investigation into sexual abuse by the Legion's founder, Marcial Maciel. The investigation had been headed by Joseph Ratzinger, who at the time was head of the Congregation for the Doctrine of the Faith.