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: Cole Haan Women's Rielle Espadrille Ballet Flat
Product description: Perforated patent and synthetic upper. Jute padded foot bed, With nearly 80 years in the business and hundreds of points of distribution in the U.S., Cole Haan is one of America's premier luxury brands. Founded in 1928 as a collaboration between Trafton Cole and Eddie Haan, Cole Haan epitomized artisan quality and impeccable craftsmanship during a time when style was everything. Originally, Cole Haan was a men's footwear label that captured the essence of the 20s spirit with beautifully-designed and well-made shoes for the dapper gentleman. Today, Cole Haan brings that heritage to all of its products, including men's and women's dress and casual footwear, belts, hosiery, handbags, small leather goods, outerwear and sunglasses.
Product feature: 100% Synthetic, Imported, Synthetic sole, Espadrille flat, Product Dimensions: 5 x 5 x 0.7 inches, Shipping Weight: 12 ounces ( View shipping rates and policies ), ASIN: B01A8HIVF0, Item model number: RIELLE ESPADRILLE, Date first listed on Amazon: April 1, 2016, Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 3.7 out of 5 stars 4 customer reviews
Product price: $18.74 - $38.98
Target attributes: Silhouette
Answer: attribute: silhouette
value: flat
source: product feature
attribute: silhouette
value: ballet
source: product title