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: Revolution Series 6" Nakiri Vegetable Cleaver Blade Color: White
Product description: FK-150 NWH Blade Color: White Features: -Blade material: Zirconium oxide. -Handle material: Polypropylene resin. -Cleaver blade cuts easily. Knife Type: -Cleaver. Construction: -Stamped. Blade Material: -Ceramic. Dishwasher Safe: -Yes. Commercial Use: -Yes. Dimensions: Overall Width - Side to Side: -3.3". Overall Length - End to End: -14". Blade Length: -6". Overall Product Weight: -0.52 lbs.
Product feature: Kyocera Nakiri Vegetable Cleaver, Unrelenting Sharpness: Razor-sharp blade stays sharper longer., Unparalleled Purity: Will never brown foods., Ultra Lightweight: Perfectly balanced., Zirconia Z206: Kyoceras proprietary advanced ceramic.
Product brand: Kyocera
Target attributes: Type
Answer: attribute: type
value: cleaver
source: product title
attribute: type
value: cleaver
source: product description
attribute: type
value: cleaver
source: product feature