Write the conversation response. 
(1) What are the main sources of lactic acid in Cider?
(2) Lactic acid is also commonly found in cider, and it is mainly formed from malo-lactic fermentation, a process that converts malic acid into lactic acid.
(1) What are the fermentation reactions?
(2) This process rounds out the flavour of the cider while reducing a lot of the acidity and producing carbon dioxide as well.
(1) Are there any other interesting aspects about this article?
(2) 
Other acids such as citric acid can be used to add taste after fermentation, but these acids are not typically found in high concentration in apples naturally.