Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Petelligence Petellus Dog Leash, X-Small, Circle, Grey
Product description: This Petellus Dog Leash Circle Grey made of high quality nylon material. Product size 3/8" x 60", for pets up to 10 lbs. Keep your dog safe and secure with durable, nylon webbing. Timeless and classic. Not for chewing, do not leave dog unattended with product.
Product feature: Nylon webbing, Straight-forward and durable, For pets up to 10 lbs., X-Small size available
Product price: $6.46
Product brand: Petelligence
Target attributes: Pet
Answer: attribute: pet
value: dog leash
source: product description
attribute: pet
value: dog leash
source: product title
attribute: pet
value: dog
source: product description