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: Key Apparel Men's Premium Lightweight Relaxed Fit Duck Dungaree
Product description: Lightweight twill dungaree stands up to the demands of the job site while offering superior breathability and comfort
Product feature: 100% Cotton, Machine Wash, Double bottom front pockets, Reinforced back pockets, Hammer loop, Package Dimensions: 12.1 x 9.6 x 1.5 inches, Shipping Weight: 1.35 pounds, ASIN: B0043V7R1W, Item model number: 450, Date first listed on Amazon: December 3, 2011, Domestic Shipping: Item can be shipped within U.S., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 4.1 out of 5 stars 7 customer reviews
Product brand: Key Apparel
Target attributes: Pattern
Answer: attribute: pattern
value: None
source: None