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:`.
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: ou can add some glucose syrup, or you can 'invert' the sugar by adding some acid, n 
A: 
what sort of acid would you recommend?