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: Dacasso Chocolate Brown Leather Square Coaster
Product description: An essential in any home, office, or conference facility! These high-quality coasters are built using a top-grain leather and felt backing with a rigid construction. These handmade pieces feature a classic design that will look classy in any setting.
Product feature: Top-Grain Leather inlay, Felt backing, 4-Inch square coaster
Product price: $8.57
Product brand: Dacasso
Target attributes: Material
Answer: attribute: material
value: leather
source: product description
attribute: material
value: leather
source: product title
attribute: material
value: leather
source: product feature