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: Wusthof Classic Flexible Boning Knife, 6-Inch
Product description: Wusthof Classic 6" Flexible Boning Knife is perfect for filleting fish with the tapered pointed blade. Forged from a single piece of tempered high carbon steel with stain resistant alloy.
Product feature: Forged, full tang knife, Ergonomic handle, Finger guard for safety, Seamless synthetic black handle, Flexible blade
Product price: $119.95
Product brand: Wsthof
Target attributes: Type
Answer: attribute: type
value: boning knife
source: product description
attribute: type
value: boning knife
source: product title