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 Input:
CONTEXT: Yes, you can use eggs well past their "sell by" date. A week past shouldn't have a noticeable difference.The older the eggs get, the more evaporation that will take place (because the eggs are washed, so they don't have a protective layer).You will notice in older eggs that there's a growing pocket of air inside the egg when you break them. (for me it tends to be on the more rounded end, but I don't know if it has to do with how you orient the eggs in storage).I know that I've used eggs more than a month past the "sell by" date, and I wouldn't be surprised if I've gone two months. It's only really a problem in baking, as the egg whites won't contribute the same amount of moisture as if they were fresh. And maybe for hard boiled eggs if you want them pretty, as you'll end up with a void where the air pocket is.  <sep>  Q: How long can refrigerated eggs last past their date? A: I know that I've used eggs more than a month past the "sell by" date, and I wouldn't be surprised if I've gone two months 

Ex Output:
how can you tell if they are bad?


Ex Input:
CONTEXT: Marshmallows expand so much because the water in them becomes steam, and gas takes up a LOT more volume than liquid. Specifically, 1 mL of water becomes ~1.36 LITERS of vapor, before it gets heated further. That's 1000-fold expansion, before you add additional expansion as the gas is heated. Marshmallows don't have all that much water content, but when it's trapped in a stretchy gelatin matrix that holds gas readily, it only takes a bit to blow the whole thing up like a balloon.You are correct that the gas expansion on its own is insufficient; unless I've badly muddled my calculations, gas expansion from 20C to ~150C (caramelization temperature) will increase the gas volume by under 50%.  <sep>  Q: Why do marshmallow get so puffed up in the microwave? A: Marshmallows expand so much because the water in them becomes steam, and gas takes up a LOT more volume than liquid  Q: How big can they get? A: 1 mL of water becomes ~1.36 LITERS of vapor 

Ex Output:
Do they ever get so big they explode?


Ex Input:
CONTEXT: Firstly - shop-bought "packet" bread will keep for several days because it contains a lot of preservatives.In his excellent book Bread Matters, Andrew Whitley claims that home-made sourdough breads with very long rises have better keeping properties than home-made bread made with baker's yeast and short rises. This, he claims, is because the sourdough yeast cultivates a culture of friendly bacteria and an acid environment, all of which become natural preservatives. My experience seems to confirm this.Bread recipes containing egg, oil or milk tend to keep for longer than those without.As @SAJ14SAJ says, bread freezes very well. Loss of flavour in the freezer is not a commonly recognised phenomenon.One option is to slice a loaf of bread, bag it and freeze it. Take as many slices as you need at a time. It will defrost very quickly at room temperature, due to its low mass and high surface area.Another option is to make rolls, part-bake, and freeze. When you need them, take as many rolls as you need from the freezer, and place in the oven, to both defrost and complete the baking. You will get fresh baking smells and flavours from this.I suspect that home-made unleavened breads (pita, chapati, tortilla), without added preservatives, will not last long out of the freezer. Their advantage is that with no rise, they are so quick to make that they can be made fresh on-demand.  <sep>  Q: What kind of homemade sandwich bread or wrap lasts longest? A: Andrew Whitley claims that home-made sourdough breads with very long rises have better keeping properties than home-made bread made with baker's yeast and short rises 

Ex Output:

Are there any homemade tortillas that last a long time?