Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: aryn K Women's Sweetheart Neckline Peplum Dress
Product feature: 70% Rayon/30% Linen, Dry Clean Only, Sweetheart neckline, Peplum dress, Package Dimensions: 13 x 11.5 x 1.3 inches, Shipping Weight: 1 pounds, ASIN: B00CFEVO7M, Item model number: AD8372B, Date first listed on Amazon: June 14, 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
Product brand: ArynK
Target attributes: Shoulder Style
Answer: attribute: shoulder style
value: None
source: None