Complex sentence: From 1946, Yang studied at the University of Chicago with Edward Teller (1908--2003), where he received his doctorate in 1948 and remained for a year as assistant to Enrico Fermi.
Split into simpler sentences: From 1946, Yang studied with Edward Teller (1908--2003) at the University of Chicago, where he received his doctorate in 1948. He remained at the University of Chicago for a year as an assistant to Enrico Fermi.