Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Skinny Pop Popcorn Snack Bags, 24 Count, 15.6 Ounce
Product description: Do you remember old-fashioned, buttered popcorn? Like the popcorn you can still get at movie theatres? We do. In fact, we used to make it. It was heavy on buttery topping and other artificial flavors. Our fans asked us for something with less topping, but with that same great taste, and we came up with SkinnyPop skinny on ingredients! We dont think anyone should feel guilty about snacking on our products. Popcorn is a whole grain food it contains the entire kernel. Because of this, it is high in fiber, rich in nutrients and has a low glycemic index. There is no artificial anything in our products meaning we do not add any artificial or synthetic ingredients, colors, flavors, or preservatives to them. No Artificial Anything and still DELICIOUS., 'ALL NATURAL POPCORN, SUNFLOWER OIL AND SALT.', Do you remember old-fashioned, buttered popcorn? Like the popcorn you can still get at movie theatres? We do. In fact, we used to make it. It was heavy on buttery topping and other artificial flavors. Our fans asked us for something with less topping, but with that same great taste, and we came up with SkinnyPop skinny on ingredients! We dont think anyone should feel guilty about snacking on our products. Popcorn is a whole grain food it contains the entire kernel. Because of this, it is high in fiber, rich in nutrients and has a low glycemic index. There is no artificial anything in our products meaning we do not add any artificial or synthetic ingredients, colors, flavors, or preservatives to them. No Artificial Anything and still DELICIOUS., Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.
Product price: $14.99
Product brand: SkinnyPop
Target attributes: Flavor
Answer: attribute: flavor
value: buttered
source: product description