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: BCBGeneration Women's Bg-Talnia Wedge Sandal
Product description: BCBGirls Footwear delivers a unique blend of uncompromising fashion. Now you can have glorious style without skimping on all-day comfort, and with a variety of different looks, you're bound to find just the right complement to any outfit. Versatile enough for casual and dress, BCBGirls provides the unlikely combination of maturity and playfulness in every style.
Product feature: 100% Leather, Synthetic sole, Heel measures approximately 4", Platform measures approximately 1", Package Dimensions: 13.2 x 8.1 x 4.2 inches, Shipping Weight: 2.35 pounds, ASIN: B004X59QQ2, Item model number: BG-TALINA, Date first listed on Amazon: May 13, 2011, 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 4 customer reviews
Target attributes: Heel Style
Answer: attribute: heel style
value: wedge
source: product title