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: Bergama Suede Leather Vest - Medium - Teal Blue
Product feature: ASIN: B0090JZV1K, Date first listed on Amazon: November 8, 2017, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Bergama
Target attributes: Pattern
Answer: attribute: pattern
value: None
source: None