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: Sweet Life Pet Supplies Basic Nylon Utility Leash ( matching collar sold separately )
Product description: This basic utility dog leash comes in six vibrant colors ( black, blue, purple, red, pink and green ) This collar is made of very flexible yet strong woven nylon for your Bestie's comfort. It comes equipped with a heavy duty metal snap. Matching collars are also available. ( Sold Separately )
Product feature: Sweet Life Pet Supplies is located in the Heartland of the US for fast and easy customer service, Matching collar available ( Sold Separately ), Woven nylon fabric for added durability, Heavy duty yet light weight metal snap for any size dog, Machine washable to keep your Bestie looking fresh (no bleach)
Product brand: Sweet Life Pet Supplies
Target attributes: Length
Answer: attribute: length
value: None
source: None