Complex sentence: Nearly half of his works (110) were in Pittsburgh, an industrial boomtown in the early twentieth century, where in 1904 he won the campus design competition for Andrew Carnegie's Carnegie Technical Schools (today's Carnegie Mellon University).
Split into simpler sentences: Nearly half of his works (110) were in Pittsburgh, an industrial boomtown in the early twentieth century. In 1904 he won the campus design competition for Andrew Carnegie's Carnegie Technical Schools (today's Carnegie Mellon University).