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: Rieker Women's Lea 04 Flat
Product description: It all began in 1845, when Mr. Heinrich Rieker started a leather exporting business. It wasn't until 1874 that the first Rieker Shoe factory was established in the hills of the Black Forest in Germany. In 1986, Rieker expanded into the United States market, and established the name Rieker Shoe Corporation U.S.A. The opening of facilities in the USA allowed for better service and product development to suit the needs of the North American market.
Product feature: 100% Polyurethane, Synthetic sole, Heel measures approximately 1", Package Dimensions: 12.8 x 6.9 x 4.5 inches, Shipping Weight: 1.85 pounds, ASIN: B002ECEKRQ, Item model number: lea 04, Date first listed on Amazon: August 12, 2009, Domestic Shipping: Item can be shipped within U.S., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 5.0 out of 5 stars 1 customer review
Target attributes: Heel Height
Answer: attribute: heel height
value: flat
source: product title