Complex sentence: In 1865 Mahlon Kline joined the business, which 10 years later became Smith, Kline & Co. In 1891 it merged with French, Richard and Company, and in 1929 changed its name to Smith Kline & French Laboratories as it focused more on research.
Split into simpler sentences: In 1865 Mahlon Kline joined the business, which 10 years later became Smith, Kline & Co. In 1891 it merged with French, Richard and Company. It changed its name to Smith Kline & French Laboratories in 1929 as it focused more on research.