Complex sentence: This global culinary culture has been produced, in part, by the concept of selling processed food, first launched in the 1920s by the White Castle restaurant chain and its visionary Edgar Waldo "Billy" Ingram and then refined by McDonald's in the 1940s.
Split into simpler sentences: This global culinary culture has been produced, in part, by the concept of selling processed food. This idea was first imagined in the 1920s by the White Castle restaurant chain and its visionary Edgar Waldo "Billy" Ingram, and was refined by McDonald's in the 1940s.