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: As long as they aren't spoiled they'll be fine for a crumble/crisp/cobbler. You'll want to have someone else taste them to make sure first. They may need less sugar and less or no precooking. If they are really, really mushy then you might want to add some firmer plums or other fruit to give some texture.  <sep>  Q: Are mushy plums OK to use in cooking? A: As long as they aren't spoiled they'll be fine for a crumble/crisp/cobbler 
[EX A]: What is they have black parts on them?

[EX Q]: CONTEXT: Just an idea... I've had problems making foam because of hard/basic tap water (a lot of chalk in the water) - making frape though, not garlic foam:) Foam will more easily form in soft water as you can easily test with a piece of soap. If you have hard tap water you could try using boiled water (some of the chalk in the water will react and leave a residue on the bottom of the pot) or bottled water with pH 7 (neutral). Another idea would be to add just enough acid for neutralisation but I imagine that could be a bit tricky and you'd risk the milk curdling so I wouldn't recommend it.  <sep>  Q: This is my first time making a foam using soy lecithin but I want to know why there was not enough foam? A: Just an idea... I've had problems making foam because of hard/basic tap water (a lot of chalk in the water 
[EX A]: How much foam should I expect?

[EX Q]: CONTEXT: You can but the result will be much thicker than that with the whole milk, and they won't taste as good due to the reduction of fat. You could add some oil or other fat to make up the diffrence, although that will most likely change the taste as well.  <sep>  Q: Substituting skim milk for whole milk in a caramel recipe A: You can but the result will be much thicker than that with the whole milk 
[EX A]:
why would it be thicker with skim milk?