Many commercial manufacturers of tomato juice also add salt. Research has been done on concentration of orange juice and tomato juice. It also claims to be Japan's largest supplier of tomato ketchup and tomato juice. In the living room, Sally makes Don a drink of vodka and tomato juice. Alcoholic writer Ernest Hemingway relied on tomato juice and beer. A strain of "Lactobacillus fermentum" was extracted from a tomato juice concentrate. The drug should be taken with acid food or drink (orange, apple or tomato juice). A less common version of the drink adds Clamato (clam/tomato juice). In the UK tomato juice is commonly combined with Worcestershire sauce. It can also be prepared with cranberry juice or tomato juice. It produces tomato juice and other products for Heinz. Tomato juice is a popular drink among airplane passengers. Dixon, walking among the rubble, sees a trail of tomato juice and decides to investigate. Tomato juice and pulp are separated by filtering and screening. However, tomato juice was not sold until 1933.