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: Joie Women's Ashira Sleeveless Dress
Product feature: 94% Viscose/6% Elastane, Imported, Hand Wash, Sleeveless dress with drop waist featuring ruched neckline and waistband, Back keyhole, Package Dimensions: 10.7 x 7.7 x 0.8 inches, Shipping Weight: 7.2 ounces, ASIN: B00XOQFQS8, Item model number: B145-D32095-002, Date first listed on Amazon: July 9, 2015, Average Customer Review: 5.0 out of 5 stars 1 customer review
Target attributes: Shoulder Style
Answer: attribute: shoulder style
value: None
source: None