Complex sentence: James Ernest Smith (1881--1973) was an engineer, educator and businessman, as well as the founder and president of the National Radio Institute (NRI) in Washington D.C., which trained 1.5 million students through home study over its 88-year history.
Split into simpler sentences: James Ernest Smith (1881--1973) was an engineer, educator and businessman. He was the founder and president of the National Radio Institute (NRI) in Washington D.C., which trained 1.5 million students through home study over its 88-year history.