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: Baxton Studios Pisanio Square Leather Storage Ottoman Black
Product description: Every home needs more seating and storage, so why not combine them? The Black Pisanio Square Leather Storage Ottoman seamlessly blends these two essentials together in a piece that fits in with almost any home d=cor. It features full bycast leather upholstery with a clean, polished finish which will help in the prevention of stains and scratches. And when you lift the top, you will uncover ample storage space in which you will be glad to stash away all your odds and ends.
Product feature: Featured in black and dark brown, 17.7" W x 17.7" D x 16.5" H, Shipping: small package, 19" L x 18" W x 18" H, Leather, Imported
Product brand: Baxton Studios
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