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: Perry Ellis Men's 3-Pack Cotton Stretch Solid/Plaid Boxer Brief
Product description: Convenient 3 pack offers 2 solid and 1 plaid combination of the best everyday underwear. Support pouch provides great fit and comfort
Product feature: 95% Cotton/5% Spandex, Imported, Machine Wash, Sculpted pouch, 4-way stretch, Soft touch, Low rise, Package Dimensions: 9.7 x 7.8 x 2.2 inches, Shipping Weight: 9.6 ounces, ASIN: B00JH9S5SE, Item model number: 960555, Date first listed on Amazon: May 9, 2014, Domestic Shipping: Item can be shipped within U.S., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 5.0 out of 5 stars 2 customer reviews
Product brand: Perry Ellis
Target attributes: Pattern
Answer: attribute: pattern
value: plaid
source: product description
attribute: pattern
value: plaid
source: product title