Complex sentence: Mulder calls the medical examiner who tells him that Scully has taken Lyle Parker back to the ranch and that Parker's blood test has revealed his father's blood-type in his stomach.
Split into simpler sentences: Mulder calls the medical examiner who tells him the Scully has taken Lyle Parker back to the ranch. He tells Mulder that Parker's blood test has revealed his father's blood-type in his stomach.