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: 24B - Copic Sketch Set 24 B Manga Wallet Marker" />
Product description: Copic sketch markers are high-quality markers use by many Japanese manga artists and fan-artists. These markers are not disposable - they have replaceable nibs, are refillable, and a delight to use. There are even airbrush attachments that you can use to create various airbrush effects. Oval body profile is roll resistant on working surfaces. Durable polyester nibs come in Medium Broad and Super Brush - a soft, flexible, fast-flowing brush for delicate or bold expression.
Product feature: o Available in 322 colors and refillable with the standard COPIC Various Inks., o Solid polypropylene body is both smooth and comfortable, for a perfect, controllable grip., o Precise and positive colored capping system provides for instant color selection., o Body inscriptions and symbols are wear resistant and easily cleaned with COPIC cleaner., 100 C4 C7 B23 B28 BG45 BG49 E50 E51 E55 E59 G14 G19 YG41 YG45 Y11 Y19 YR16 V12 V17 RV02 RV06 R22 R29
Product price: $140.40
Product brand: Copic
Target attributes: Type
Answer: attribute: type
value: markers
source: product description
attribute: type
value: marker
source: product title