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: Qupid Nadine-88X Vintage Inspired Vegan Suede Round Toe T-Strap Ankle Strap Cut Out Pump
Product description: Spice up your outfit with these sophisticated round toe pumps. Featuring t-strap construction, cut out detail at front vamp, stitching accents, low hidden platform, wrapped heel. Finished with padded insole and adjustable ankle strap with buckle closure.
Product feature: 100% Man-made, Material: Man-made, Heel Height: Approx. 4.25" w/ 0.75" Platform, FREE SHIPPING for any additional items at Room of Fashion, Package Dimensions: 11.1 x 8.6 x 4 inches, Shipping Weight: 1.8 pounds, ASIN: B00E651I2O, Date first listed on Amazon: July 26, 2013, Average Customer Review: 4.1 out of 5 stars 13 customer reviews
Product brand: Qupid
Target attributes: Toe Style
Answer: attribute: toe style
value: round toe
source: product description
attribute: toe style
value: round toe
source: product title