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: Collins Axe Drop Forged, Heat Treated, Single Bit 3-1/2 Lb. Jersey 36 "
Product description: "Collins" Axe Jersey Pattern Single Bit 3-1/2 lb Drop forged and heat treated 36" hickory handle Ground and charcoal polished Replacement handle Catelog ID 40256112,40265341 and 41006840
Product feature: Blade Head Material: Forged Steel, Drop forged and heat treated, Ground and charcoal polished, Handle Material: Hickory, Head Weight: 3-1/2 lb.
Product price: $29.33
Product brand: Collins
Target attributes: Axe Length
Answer: attribute: axe length
value: 36"
source: product description
attribute: axe length
value: 36 "
source: product title