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: Bettie Page Women's Bp100-Halle Oxford
Product description: Oxford flat
Product feature: Polyurethane, Imported, Synthetic sole, Vintage inspired, Flat, Retro vintage inspired, Fabric lining, Two toned, Shipping Weight: 6.2 ounces ( View shipping rates and policies ), ASIN: B017I9YIEY, Item model number: BP100-HALLE, Date first listed on Amazon: April 21, 2016, Average Customer Review: 3.4 out of 5 stars 19 customer reviews
Product price: $47.32 - $65.00
Product brand: Bettie Page
Target attributes: Silhouette
Answer: attribute: silhouette
value: oxford
source: product description
attribute: silhouette
value: oxford
source: product title