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: The old thin utensils were made of Nylon.The reasons they are hard to find is that traditional Nylon is difficult to manufacture within food standard guidelines for PAA (Primary Aromatic Amines) migration, and does not bio-degrade or burn safely. For relevant references, your local government health department will have papers on PAA migration.Given that, many utensil manufactures have moved on to other plastics, mostly silicone. Though some use PA66 (Nylon 6,6), which is that thick chunky black plastic stuff.Try wooden spatulas. They are simple, clean, disposable, and you can get them in thin wedge shapes (e.g. at Asian supply shops).  <sep>  Q: Where did the thin, smooth plastic spatulas go?###20 years ago, the most common type of rigid spatula (or "turner") was smooth, thin (as in 3mm or less with a sharp edge), and generally made of nylon.### These spatulas were not very durable (leading edges tended to melt), but they were very very good for making eggs and other delicate non-stick-pan dishes. A: they are hard to find is that traditional Nylon is difficult to manufacture within food standard guidelines for PAA (Primary Aromatic Amines) migration, and does not bio-degrade or burn safely 
[A]: Why did manufacturers stop making thin, smooth plastic turner spatulas?


[Q]: CONTEXT: They're commonly called squash blossoms in English - as you might guess, this is because it doesn't matter too much what kind of squash they're from. They'll most commonly be from smaller summer squash plants (e.g. zucchini) though, since they produce many small squash instead of a few large squash (like pumpkins), so you can get more blossoms for your trouble.  <sep>  Q: What variety of squash produces "flor de calabaza"? A: They'll most commonly be from smaller summer squash plants (e.g. zucchini 
[A]: What type of squash will produce the best tasting flower?


[Q]: CONTEXT: Cooked foods are starting with a very low bacterial count, because the cooking process killed everything. Defrosting foods are starting from an unknown count, because they picked up some during the cooling process before they were frozen. Bacteria multiplies exponentially, so the starting point matters greatly.I'm glad you asked for theories because I don't have anything to back this up.  <sep>  Q: Why can't food be left out to defrost? A: Cooked foods are starting with a very low bacterial count, because the cooking process killed everything 
[A]:
What is the best way to defrost food, then?