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: Women Girls Canvas Vintage Backpack Rucksack College Shoulder School Bag Bookbag (Black)
Product description: High Quality Canvas Material! Easy to clean! Colorful Colors! Perfect decorates your daily life! Comes with sponge tier. Perfect protect your items! Size:Body:42x28x15 cm/ 16.5x 11x 5.9inches. Package: backpack x1
Product feature: High Quality Canvas Material! Easy to clean!, Colorful Colors! Perfect decorates your daily life!, Comes with sponge tier. Perfect protect your items!, Size:Body:42x28x15 cm/ 16.5x 11x 5.9inches, Package: backpack x1
Product price: $9.99
Product brand: surepromise
Target attributes: Capacity
Answer: attribute: capacity
value: None
source: None