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: Regal Art & Gift Spiral Wall Decor, Amber
Product description: Our striking copper spiral wall decor has a beautiful blend of copper running to gold. Made of metal, it can be hung inside or out.
Product feature: Spiral wall decor, Large unique decor, Can be used indoors and outdoors
Product price: $69.99
Product brand: Regal Art & Gift
Target attributes: Material
Answer: attribute: material
value: metal
source: product description
attribute: material
value: copper
source: product description