Complex sentence: Kamp contrasts Dione Lucas's cooking show and cooking school with that of James Beard, noting also that their prominence in the 1950s marked the emergence of a New York-based, nationally-and internationally-known sophisticated food culture.
Split into simpler sentences: Kamp contrasts Dione Lucas's cooking show and cooking school with that of James Beard's. Kamp notes that Lucas and Beard's prominence in the 1950's marked the emergence of a New York based, nationally-and internationally-known sophisticated food culture.