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: Luiza Barcelos Women's CY023R Flat
Product description: Inspired by simplicity, culture and art, Luiza Barcelos shoes bring femininity and confidence to the everyday lives of women. They deliver high quality and style at affordable prices.
Product feature: 100% Leather, Leather sole, Heel measures approximately 0.25", Suede and leather trim, Hard leather sole, Lace-up oxford, Lace-up oxford, Heart cut out details, Package Dimensions: 12 x 8 x 4 inches, Shipping Weight: 2 pounds, ASIN: B005VNW2TS, Item model number: CY023R, Date first listed on Amazon: February 4, 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: 5.0 out of 5 stars 1 customer review
Target attributes: Heel Height
Answer: attribute: heel height
value: flat
source: product title