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: Calvin Klein Women's Plus-Size Sleeveless Open-Lace Top
Product feature: 50% Nylon/50% Polyester, Imported, Hand Wash, Sleeveless top featuring cropped swirling lace overlay and round neckline, Contrast chiffon lining with extended hem, Package Dimensions: 10.6 x 9 x 3.4 inches, Shipping Weight: 0.32 ounces, ASIN: B00LWAYXUA, Item model number: W4KAP689, Date first listed on Amazon: December 20, 2014, Domestic Shipping: Item can be shipped within U.S., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 4.0 out of 5 stars 1 customer review
Target attributes: Shoulder Style
Answer: attribute: shoulder style
value: None
source: None