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: Dog Leash 1" Wide Nylon 5ft Length with Leather Enforced Snap Black Large
Product description: Strong and durable dog leash made of 1" wide fray resistant nylon. Genuine leather enforced swivel snap base for extra safety. Strong and durable 5' long leash - ideal for daily walks and training. Dog leashes that are built to last.
Product feature: Strong and durable dog leash made of 1" wide fray resistant nylon, Genuine leather enforced swivel snap base for extra safety, Strong and durable 5' long leash ideal for daily walks and training, Dog leashes that are built to last
Product price: $14.90
Product brand: Dogs My Love
Target attributes: Length
Answer: attribute: length
value: 5'
source: product feature
attribute: length
value: 5ft length
source: product title