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: French Sole FS/NY Women's Loop Ballet Flat
Product description: Fun prints on a classic ballet, Randy Ochart, owner of French Sole brand, has passionately focused on designing, manufacturing and marketing fashion ballerina flats for more than twenty-five years. And now the stars are aligned because ballerinas are red hot. Produced in France, Spain, Italy and Brazil, French Sole shoes are the must-have shoe of the season. French Sole's success is based on the fusion of true comfort and real fashion.
Product feature: 100% Synthetic, Imported, Leather sole, Heel measures approximately 0.5", Patent leather, Package Dimensions: 12 x 8 x 4 inches, Shipping Weight: 2 pounds ( View shipping rates and policies ), ASIN: B004L4L0ZK, Item model number: Loop, Date first listed on Amazon: May 4, 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: 2.7 out of 5 stars 6 customer reviews
Product price: $23.63 - $128.00
Product brand: French Sole FS/NY
Target attributes: Heel Height
Answer: attribute: heel height
value: flat
source: product title
attribute: heel height
value: flats
source: product description