Complex sentence: The Doctor and Susan said that they weren't originally from Earth in both "An Unearthly Child" and "The Sensorites"; however, "The Sensorites" also had the Doctor describe himself as a human.
Split into simpler sentences: The Doctor and Susan said that they weren't originally from Earth in both "An Unearthly Child" and "The Sensorites". However, "The Sensorites" also had the Doctor describe himself as a human.