Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: ShinHan Touch Twin Marker - 0 Colorless Blender
Product description: ShinHan Arts TOUCH TWIN marker are now available in 36 additional new colors for a total of 204 brilliant colors ideal for a diverse range of uses, from animation, illustration, architectural renderings, and interior design sketches. With a unique fine point nib on one side and a broad chisel nib on the other, the TOUCH TWIN marker offers artists and designers a greater range of line thicknesses than ever before. The delivery of ink flow can be perfectly controlled to allow precision drawing. The ergonomically designed rectangular body is roll resists rolling on work surfaces and provides a perfect grip that avoids smudges and smears. A specially designed safety cap stacks neatly and prevents damage to the nibs. The TOUCH TWIN marker contains an alcohol-based ink that doesn't dissolve printed ink toner, allowing for odorless, vividly colored artwork on printed materials. Refillable ink and replaceable nibs are also available for the TOUCH TWIN marker.
Product price: $8.08
Product brand: shinhan art
Target attributes: Quantity
Answer: attribute: quantity
value: None
source: None