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: Hanes Mens Comfort Soft Boxer Brief 2 Pack # 7460P2
Product description: 100% SuperSoft ring-spun Cotton. Nothing quite like it against your skin. And check the unique fabric-covered waistband and Tagless design.
Product feature: boxer-briefs closure, Fiber Content: "Solids: 100% Cotton; Heathers: 75% Cotton, 25% Polyester", Colors for styles that come in packs of Assorted Colors may differ from color shown on photo., Shipping Weight: 1 pounds, ASIN: B000CD106I, Date first listed on Amazon: December 28, 2015, Average Customer Review: 4.0 out of 5 stars 3 customer reviews
Target attributes: Silhouette
Answer: attribute: silhouette
value: boxer-briefs
source: product feature
attribute: silhouette
value: boxer brief
source: product title