Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: MLS Seattle Sounders FC 2012 Tropheo Soccer Ball
Product description: Practice all your moves and take all the winning shots with the official 2012 Tropheo ball by Adidas.
Product feature: 100% Polyurethane, Buttle blatter for best air retention. Machine stitched construction ensures a soft touch and high durability., Made by Adidas, the official outfitter of the MLS., Wipe with a damp cloth., Pakistan
Product brand: adidas
Target attributes: Size
Answer: attribute: size
value: None
source: None