Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Luminance 6901 Color Pencil, 803 French Grey 30%
Product description: Creative art materials supplies, manufactures and distributes quality art products to art, hobby and craft retail outlets.
Product feature: High lightfastness and smoothness, Pigments chosen for purity - intensity - resistance to UV, Can be blended - burnished - layered, Wood casing made from California Cedar forests
Product price: $5.81
Product brand: Caran d'Ache
Target attributes: Quantity
Answer: attribute: quantity
value: None
source: None