Cattleya Diane Sato = Cattleya Dorothy Phelps x Cattleya White Belle
Cattleya Dorothy Phelps = Cattleya Eucharis x Cattleya Irene (1914)
Cattleya White Belle = Cattleya mossiae x Cattleya White Empress
Do you want all the generations back to species?
Overall, the species make-up of Diane Sato is similar to Bob Betts, lots of Cattleya mossiae, some Cattleya gaskelliana and Cattleya trianae, but Diane Sato also has a Cattleya warneri ancestor way back.
Carl Hausermann, with a C, btw...