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:`.
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Question: CONTEXT: There's not really anything easy you can do. Even adding lemon zest or essence isn't really going to help; it'll just give you a lemony but still sweet cake. I suppose theoretically you could add sour things, since that does tend to balance out sweetness, but it's tricky since acid will interact with the leavening. A sour icing, or a sour sauce to serve it with, might be a better bet in that vein.So unfortunately, you'd be best off shopping around for cake mixes that are more the level of sweetness you want. You might be able to use the nutrition facts to help get a sense of how sweet they are before you buy them.  <sep>  Q: How can I make cake mix less sweet? A: theoretically you could add sour things 

Answer: Could I add flour?


Question: CONTEXT: Our brains are wired to consider food more palatable if the dedicated taste receptors (one of the six basic tastes) for salt are triggered. And in a non-urban world, salt/sodium is a valuable nutrient; the fact we might have it too readily available in the developed world doesn't change that we would DIE on a zero-sodium diet (mind that animal products like meat aren't zero-sodium, and that herbivores tend to love licking salt where they find it!). So our brains have a good evolutionary reason to like salt.Also, salt actively interferes (negatively) with another basic taste receptor - the receptor for bitterness (which can mean poison both in nature and in the developed world, or at least something we have no use for, eg an alkali). Most aromatic food (think green vegetables or spices) is bitter, and salt both attenuates that perception and balances it making the combined food still desirable for our brain. You end up with an even more palatable food since you can use an aromatic (desirable) and shut out the bitterness (not always desirable) response.Umami is a different basic taste, probably related to the presence of protein (glutamate, inosinate, guanylate... trigger it - these are amino acids or salts thereof, and an indicator of easily-digestible protein presence).  <sep>  Q: Why does salt enhance the flavor of food? A: Our brains are wired to consider food more palatable if the dedicated taste receptors (one of the six basic tastes) for salt are triggered  Q: Is salt related to umami? A: Umami is a different basic taste, probably related to the presence of protein 

Answer: Are there compounds similar to salt that enhance flavor?


Question: CONTEXT: Fat doesn't spoil like other foods. No bacteria can live in fat. Going rancid is a chemical reaction in which the fat molecules break down. So "leaving out" is not a problem. The major factors in going rancid are light and air. The more light hits your fat, the sooner it goes rancid. Also, rancidity occurs when the fat is oxidized, meaning that if you prevent contact with air, your fat will last longer. Both factors are minimized by transferring the fat to a tightly closed opaque container. With liquid oils, you use a dark colored bottle. As bottles are impractical for solid fat, just strain your grease into a jar, close it, and put it in a cupboard. The shelf life should be many months, probably more than a year. Also, don't worry that you can get something nasty when the grease goes bad unnoticed. Rancid fat isn't a big safety risk, and ingesting it in small amounts is not problematic. If it stinks, throw it out. Before that, there is no problem eating it. The above assumes pure, well-strained fat. Pieces of fried meat left over in the fat are a safety risk, even tiny ones.  <sep>  Q: How long does grease take to go bad/rancid when sitting out? A: The shelf life should be many months, probably more than a year  Q: is that true for all types of grease? for example is it different for bacon grease versus ground beef grease? A: The above assumes pure, well-strained fat. Pieces of fried meat left over in the fat are a safety risk, even tiny ones 

Answer:
So, it is the meat particles in the fat that can make it go rancid not the actual fat itself, should I sieve it before storing it?