Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Walnuts Og2 Hvs/Pcs 5 LB by Bulk Nuts
Product description: A very common ingredient found in many baking items., 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: $102.58
Product brand: Nuts
Target attributes: Preparation
Answer: attribute: preparation
value: None
source: None