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: Twelfth Street by Cynthia Vincent Women's Waisted Drop Neck Mini Dress
Product feature: 100% Silk, Dry Clean Only, Variegated stripe print, Slant pockets, Package Dimensions: 8 x 7.4 x 3.2 inches, Shipping Weight: 3.2 ounces, ASIN: B00B1MY9TY, Item model number: 16SCD1451, Date first listed on Amazon: March 10, 2013, Domestic Shipping: Item can be shipped within U.S., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 5.0 out of 5 stars 1 customer review
Target attributes: Shoulder Style
Answer: attribute: shoulder style
value: None
source: None