Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Raw Walnut Tiny Pices, 4 lbs bag
Product description: Actual product packaging and materials may contain more and different information than what is shown on our website. We recommend that you do not rely solely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. Please see our full disclaimer below., Raw walnut tiny pieces, using for bakery, 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: $28.99
Product brand: Green Bulk
Target attributes: Preparation
Answer: attribute: preparation
value: raw
source: product title
attribute: preparation
value: raw
source: product description