Complex sentence: Godfather's was founded in Omaha, Nebraska, in 1973 by William Theisen, who sold it to Pillsbury in the mid- 1980s and stepped down from actively managing the company.
Split into simpler sentences: Godfather's was founded in Omaha, Nebraska, in 1973. Theisen sold the company to Pillsbury in the mid- 1980s and stepped down from actively managing the company.