Complex sentence: From 1952 until 1962 Dijkstra worked at the Mathematisch Centrum in Amsterdam, where he worked closely with Bram Jan Loopstra and Carel S. Scholten, who had been hired to build a computer.
Split into simpler sentences: From 1952 until 1962 Dijkstra worked at the Mathematisch Centrum in Amsterdam. He worked closely with Bram Jan Loopstra and Carel S. Scholten, who had been hired to build a computer.