Given a paragraph about cooking, and a set of conversational question answers about the paragraph, generate a relevant question to the topic of the paragraph. The paragraph has the prefix 'CONTEXT:'. Each conversation question has a prefix `Q:` followed by the answer prefix `A:`.

[EX Q]: CONTEXT: There is not really a turning point. The way that wine goes bad is the process of making vinegar. From wikipedia:The word "vinegar" derives from the Old French vin aigre, meaning "sour wine".The Canadian government limits things that can be sold as 'vinegar' to something with an acetic acid content of 4-12%, so you could do the technical-bureaucratic thing and wait for the acetic acid to get up to 4%.If you aren't hung up on technicalities, then you can use it as soon as it gets sour enough. It is done when all the alcohol has been changed to acetic acid, but it is a bit hard to taste since the acetic flavor dominates.  <sep>  Q: When is homemade wine-based vinegar simply bad wine? A: There is not really a turning point. The way that wine goes bad is the process of making vinegar 
[EX A]: Oh okay so I can store it in my cabinet?

[EX Q]: CONTEXT: I would consider the professional equivalent of the electric carving knife to be the meat slicer, i.e. the rotating blade device most often seen behind the deli counter.At home, to break down a roast bird, take the meat off of a lamb-leg, etc., a good manual knife is most likely the proper tool.If, on the other hand, I have a large ham (cooked or cold), or some other chunk of boneless meat that I want to slice more-or-less uniformly, then I will break out my electric knife. For the home user, it is a fairly practical device, not taking up too much space, etc.But its uniformity and speed cannot compare to the slicer. As to a professional kitchen, you may or may not find one there. Certainly in deli-type restaurants you would have them. In a more traditional restaurant they are not as concerned with quick production of sliced meat, so any slicing is probably done by hand.  <sep>  Q: Are electric knives used in foodservice? A: I would consider the professional equivalent of the electric carving knife to be the meat slice 
[EX A]: Why are electric knives not used?

[EX Q]: CONTEXT: There are a couple of things you can do to prevent sugar crystallising. You can add some glucose syrup, or you can 'invert' the sugar by adding some acid, namely cream of tartar. Both should be readily available, online if not at your supermarket. Cream of tartar is also useful when making meringue.  <sep>  Q: How can I prevent simple syrup from crystallizing? A: There are a couple of things you can do to prevent sugar crystallising  Q: well when I store it in the fridge it seems to crystallize A: You can add some glucose syrup, or you can 'invert' the sugar by adding some acid, namely cream of tartar 
[EX A]:
When do you add the acid?