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:`.

CONTEXT: Anything can spoil eventually, refrigerated or not. Keeping something under a lid and refrigerated restricts the number of airborne colonizers that might get access to it, and the cold temperature means that even if they get there, they will grow much slower than at room temperature.For something to spoil, it needs to be colonized by bacteria or fungus spores, and it needs to contain some nourishment to support their growth, not too much chemicals that prevent their growth, and not too much competing life forms already present. So, things with a high concentration of salt or sugar tend to be unhospitable to bacteria and fungi growth, because they are hygroscopic (they draw the water out of cells). Extreme high or low pH (eg acidic) also retards growth. Think of things like ketchup, mustard, jelly with labels that say "refrigerate after opening" but most people ignore them. Alcohol is unfriendly if the concentration is too high, and of course natural fermented foods are already occupied by human-friendly bacteria.Ketchup is sealed in a bottle, usually with no fingers or utensils inserted into it, so it stays pretty sterile. It is also protected by being hygroscopic (due to high concentration of sugar and salt) and its acidity. Ketchup as a word and concept is descended from an Indonesian fish sauce, and has been around much longer than refrigeration. I think you can leave it out with no worries unless you see obvious mold growth.  <sep>  Q: Does ketchup belong in the fridge, or the cupboard? A: has been around much longer than refrigeration. I think you can leave it out with no worries unless you see obvious mold growth  Q: What type of mold can grow on ketchup? A: For something to spoil, it needs to be colonized by bacteria or fungus spores 
What can happen if I eat ketchup that is spoiled?

CONTEXT: Can't comment on the nutritional side of things, but the main reason I can think of for not always including it is that it has a slightly different flavour. A much more intense lemon flavour is provided by the zest while the juice has the more tart elements (and of course water).If you're just interested in avoiding waste, you can freeze the zest.  <sep>  Q: Are there any reasons not to include the zest when citrus juice is an ingredient? A: Can't comment on the nutritional side of things, but the main reason I can think of for not always including it is that it has a slightly different flavour  Q: What can I do to avoid so much waste? A: If you're just interested in avoiding waste, you can freeze the zest  Q: Good idea. Any other suggestions? A: A much more intense lemon flavour is provided by the zest while the juice has the more tart elements (and of course water 
What types of things do you put zest in?

CONTEXT: I believe that 'English Breakfast Tea' is a very broad definition and doesn't refer to an exact blend; each manufacturer has their own version of it. I would say that English Breakfast Tea often includes Assam, but as your Wiki source suggests it also contains other teas. Therefore Assam is a separate tea.  <sep>  Q: Is English Breakfast Tea the same as Assam Tea? A: I believe that 'English Breakfast Tea' is a very broad definition and doesn't refer to an exact blend 

Is it true that I need Assam tea for brewing a good cup of Chai Tea?