Complex sentence: Back in the U.S., he received a degree in civil engineering from South Dakota School of Mines in Rapid City in 1961, and then earned an advanced degree from University of South Dakota School of Law in Vermillion in 1966.
Split into simpler sentences: Back in the U.S., he received a degree in civil engineering from the South Dakota School of Mines in Rapid City in 1961. He earned an advanced degree from University of South Dakota School of Law in Vermillion in 1966.