Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: CLIF BAR Nutrition & Energy Bar - Crunchy Peanut Butter - (2.4 oz)
Product description: Ready to go whenever and wherever you are, CLIF combines simple and organic ingredients that are good for both our bodies and the planet. A delicious way to energize your day. Grab a Clif bar and go., CONTAINS SOY AND PEANUTS. MAY CONTAIN TRACES OF WHEAT AND TREE NUTS., Organic Brown Rice Syrup, Organic Rolled Oats, Organic Cane Syrup, Soy Protein Isolate, Organic Peanut Butter, Peanut Flour, Rice Flour, Peanuts, Organic Soy Flour, Organic Oat Fiber, Organic Roasted Soybeans, Organic Date Paste, Natural Flavors, Sea Salt, Barley Malt Extract., 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 brand: CLIF
Target attributes: Flavor
Answer: attribute: flavor
value: peanut butter
source: product title
attribute: flavor
value: peanut butter
source: product description