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: I have been told that cedar, white and yellow pine, and many other variaties are safe in normal quantities and have high vitamin content. Some have supposed medicinal effect for headaches, such as cedar. My advice is to look up "tea" or "infusion" with each type of needle you want to try so you can avoid a poisonous concoction. As for white pine, I have made delicious tea for breakfast and for the canteen with it while camping and have survived so far. It goes quite well with wild mint. <sep> Q: What are the safety considerations in making pine needle tea? A: I have been told that cedar, white and yellow pine, and many other variaties are safe in normal quantities and have high vitamin content

A: How I can make the most benefit of the vitamins in the tea ?
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Q: CONTEXT: They're good pretty much forever. There is not enough available water for things to grow in there. Mind you, the more aromatic and subtle parts of the flavor will dissipate over time. The sugar absorbs water, giving the combination a very low water activity, meaning there's little water available for microorganisms to use in growth. As long as your flavoring pieces are small and well mixed with sugar they will not spoil. <sep> Q: How long is sugar (mixed with minor ingredients) good for? A: They're good pretty much forever

A: What if they are mixed with lemon zest?
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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

A:
What is they have black parts on them?
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