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: Adj Red Double Dog Leash 5/8"
Product description: "ASPEN" PET LEASHESLeashes feature a higher thread count and box stitching to ensure our leashes are some of the most durable on the market.Adjustable tangle-free two-dog leash with swivel yoke has a comfort cushion handle that reduces hand stress and slippage.Pet leashes are woven tight to prevent piling, scuffing and roll over.Adjustable length gives more freedom for different sized dogs. Color=Red5/8"
Product feature: Leashes feature a higher thread count and box stitching to ensure our leashes are some of the most durable on the market., Adjustable tangle-free two-dog leash with swivel yoke has a comfort cushion handle that reduces hand stress and slippage., Pet leashes are woven tight to prevent piling, scuffing and roll over., Adjustable length gives more freedom for different sized dogs., Color=Red
Product brand: Aspen Pet
Target attributes: Length
Answer: attribute: length
value: None
source: None