Complex sentence: Kohl's started its first supermarket in 1946 and expanded into department stores in 1962, Ten years later, Kohl's was purchased by British-American Tobacco which decided to spin off the grocery stores to A&P a decade later.
Split into simpler sentences: Kohl's started its first supermarket in 1946 and during the 1960s expanded into department stores. In 1972, Kohl's was purchased by British-American Tobacco which decided to spin off the grocery stores to A&P a decade later.