Given a paragraph about cooking, and a set of conversational questions and answers about the paragraph, say whether the passage contains sufficient information to answer the follow-up question. Say Yes if it is answerable; otherwise, say No. The paragraph has the prefix 'CONTEXT:'. Each conversation question has a prefix `Q:` followed by the answer prefix `A:`, and the follow-up question has a prefix `FOLLOWUP_Q:`.

CONTEXT: In the US, I normally see them marketed as "heirloom" tomatoes; I don't know if there are specific regulations in the UK or Finland that might have restrictions on the term's use. (like there now is in the US with "organic" )Because they weren't developed for industrialized farming, they didn't focus on breeding in traits that were desired for mass production -- size, round shape, bright color, shelf life, durability in transport.As such, there's a much wider variety, and they tend to be locally grown on small farms (as they don't tend to transport well, or be suitable for mechanized production). They might've been bred for sweetness, tartness, number of fruit per plant, disease resistance, etc, so you can't say that heirlooms necessarily taste better; a locally grown, picked that day non-heirloom tomato might taste just as good.To make this clear -- very few vegetables are produced in a truly 'uncontrolled' environment (maybe 'less controlled' environment)-- humans have been selecting for specific traits for centuries; it's just that the processes used were much less high-tech back then -- you saved the seeds from plants that produced what you liked, it's possible that some might've even been hand-pollinated to cross breed cultivars.)  <sep>  Q: What makes a tomato "heirloom"? A: They might've been bred for sweetness, tartness, number of fruit per plant, disease resistance  Q: What is the difference between heirloom and conventional tomatoes? A: they weren't developed for industrialized farming, they didn't focus on breeding in traits that were desired for mass production  <sep> FOLLOWUP_Q: Is heirloom the same as heritage?
No

CONTEXT: A lot of sourdough recipes don't call for a sponge, per se, because the starter essentially already is a sponge. The purpose of a sponge in a bread with normal yeast is to allow a longer fermentation time and extra time for enzymatic reactions to happen in the flour before adding it to the final batch. This isn't necessary with sourdough the starter is continuously fermenting and reacting. And your guess is about right, if the proportion of starter you add is too high, the waste products and dead yeast cells in it can cause changes in the gluten that make it very slack and unusable.  <sep>  Q: How does a sourdough sponge work? A: The purpose of a sponge in a bread with normal yeast is to allow a longer fermentation time and extra time for enzymatic reactions to happen in the flour before adding it to the final batch  Q: Why is it important to increase the fermentation time ? A: The purpose of a sponge in a bread with normal yeast is to allow a longer fermentation time and extra time for enzymatic reactions to happen in the flour before adding it to the final batch  Q: wouldn't the sourdough break down the gluten in the sponge ? A: if the proportion of starter you add is too high, the waste products and dead yeast cells in it can cause changes in the gluten that make it very slack and unusable  Q: What is the right amount of starter I should use ? A: if the proportion of starter you add is too high, the waste products and dead yeast cells in it can cause changes in the gluten that make it very slack and unusable  <sep> FOLLOWUP_Q: do you have any other tips for making a perfect sponge ?
No

CONTEXT: To clarify: forced-air (a/k/a "convection", a/k/a "fan bake") ovens rely on a fan to circulate the air in the oven. The fast-moving air substantially enhances the rate at which heat is transferred to the food. It is particularly good where you want the surface to brown, such as roasts and breads; it is not as good for more delicate items, such as custards and cakes, which can set too quickly or get dried out. For cookies, it depends on what effect you want, but many standard types do well in forced-air ovens because the fan helps ensure that the whole oven stays at a uniform temperature despite the presence of several trays. (Of course, the tray closest to the heating element will still cook faster than the one farthest away, so you will still have to swap them partway through.)The general rule for using the fan is to set the oven temperature 25 degrees F (15 C) lower than what the recipe calls for using in a regular oven. Even then, don't go strictly by cooking time, as ovens vary; rather, be sure to check on your food regularly to see how fast it is cooking. You may need to cover your food to prevent over-browning, or perhaps adjust the oven temperature.  <sep>  Q: Is it better to use a fan when baking ? A: It is particularly good where you want the surface to brown, such as roasts and breads  Q: Should the fan be on high or low speed ? A: it depends on what effect you want  <sep> FOLLOWUP_Q: what are the cases when it is better to not use a fan ?

No