Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Monster High Girls 16 Inch Large School BackpackBackpack Bag
Product description: Monster High 16" large school backpack for girls.
Product feature: 16" Inch Large Backpack, Padded Adjustable Shoulder Strap, Mesh and Velcro Side Pockets, 1 Main Compartment and 2 Front Pockets, Monster High Designed Bag
Product brand: Monster High
Target attributes: Capacity
Answer: attribute: capacity
value: None
source: None