Complex sentence: He then studied at UCLA, earning an M.A. in 1986 and a PhD in 1990; his dissertation was entitled "Knowledge, Epistemic Possibility, and Skepticism", under Rogers Albritton.
Split into simpler sentences: He then studied at UCLA, earning an M.A. in 1986 and a PhD in 1990. His dissertation was entitled, "Knowledge, Epistemic Possibility, and Skepticism" and his thesis advisor was Rogers Albritton.