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: Breckelle's OUTLAW-81 Fashion Basic Knee High Classic Buckle Riding Boot, Tan, 6 B(M) US
Product description: The OUTLAW TAN-11 6 shoes feature a basic manmade sole with synthetic upper.
Product feature: Synthetic, manmade sole, manmade sole, synthetic upper, Package Dimensions: 10.9 x 10.3 x 5.3 inches, Shipping Weight: 2.4 pounds, ASIN: B00EC4APNC, Date first listed on Amazon: August 4, 2013, Average Customer Review: 4.1 out of 5 stars 5 customer reviews
Product brand: Breckelles
Target attributes: Heel Style
Answer: attribute: heel style
value: None
source: None