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: Wanted Shoes Women's Scope Slip-On Loafer
Product description: In a fashion-conscious world that constantly pursues cutting-edge trends, Wanted Shoes remains dedicated to delivering the latest and greatest styles in women's footwear. By keeping its finger on the pulse of fashion, Wanted distinguishes itself as a leading brand, with both quality and affordability. With a great team stylists who truly have a passion for fashion, Wanted Shoes remains true to its name, leaving women of all ages wanting more.
Product feature: 100% Synthetic, Synthetic sole, Heel measures approximately 0.5", Breathable ethylene vinyl acetate construction, Package Dimensions: 12.1 x 5.4 x 4.1 inches, Shipping Weight: 12.8 ounces, ASIN: B0067GKR9A, Item model number: SCOPE, Date first listed on Amazon: May 22, 2012, Domestic Shipping: Item can be shipped within U.S., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 3.4 out of 5 stars 5 customer reviews
Product brand: Wanted
Target attributes: Silhouette
Answer: attribute: silhouette
value: loafer
source: product title