sentence: Fermentation is used when making dairy products.
sentences_before: If milk is not kept cold in a refrigerator, it will become sour after some time. When milk is warmed, it turns sour. Fermentation makes this happen. Lactic acid bacteria changes the milk sugar into lactic acid.
concept_name: fermentation
headings: Milk Storing milk
categories: Basic English 850 words Symbols of Oklahoma