Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Calvin Klein Women's Blaine Pump
Product description: Calvin Klein is a premier American designer and global brand leader responsible for creating everything from home goods to fashionable shoes and apparel. Known as "the supreme master of minimalism," Calvin Klein is one of the worlds most prestigious and luxurious brands, setting the tone of elegance and modern sophistication.
Product feature: 100% Leather and synthetic, Synthetic sole, Heel measures approximately 3.25", Package Dimensions: 12.2 x 8.3 x 4.8 inches, Shipping Weight: 2.15 pounds, ASIN: B005K6Y26C, Item model number: Blaine, Date first listed on Amazon: January 28, 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: 3.3 out of 5 stars 9 customer reviews
Target attributes: Toe Style
Answer: attribute: toe style
value: None
source: None