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: DexShell Waterproof Trekking Socks Large
Product feature: 24% nylon, Mid-calf length merino wool athletic socks, Porelle membrane prevents water from passing through, Merino wool reacts to your body's temperature, keeping you warm when it's cold and releasing body heat and moisture when it's hot, Seamless construction for the highest comfort, Cushioned footbed, Perfect for trekking, hiking, camping and other long-range activities, Outer: 96% Nylon, 3% Elastane, 1% Cuff Elastics, Interlining: 100% Waterproof and Windproof Porelle(R) Membrane, Inner: 38% Merino wool, 38% Anti-pilling acrylic, 24% Nylon, Mid-calf length, Seamless construction for the highest comfort, Cushioned footbed, Small - Men 4-6 (Women 5-7), Medium - Men 6.5-9 (Women 7.5-10), Large - Men 9.5-12 (Women 10.5-13), XL - Men 12.5-14.5
Product price: $39.98
Product brand: DexShell
Target attributes: Pattern
Answer: attribute: pattern
value: None
source: None