Complex sentence: As "Defiant" reaches Earth, Sato contacts Admiral Gardner (John Mahon), declares herself "Empress Sato", and demands Earth's surrender or else "Defiant" will attack.
Split into simpler sentences: As "Defiant" reaches Earth, Sato contacts Admiral Gardner (John Mahon). She declares herself "Empress Sato", and demands Earth's surrender or else "Defiant" will attack.