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: Steve Madden Men's Sirius Chukka Boot
Product description: Denim and suede are pieced together for a relaxed, yet sophisticated dress oxford., Steve Madden, the company, was founded by Steve Madden, the man, in 1990 in Brooklyn, where he started out making trend-advancing shoes one pair at a time. It was not long after that the Steve Madden focus on "now-ness" earned rave reviews from young female fans mad for the funky, chic, and yet competitively priced footwear it produced. The company popularized the "dressy sneaker," and continues to man the forefront of trends.
Product feature: 100% Fabric, Suede, Imported, Synthetic sole, Heel measures approximately 1", Denim and suede are pieced together for a relaxed, yet sophisticated dress oxford., Package Dimensions: 13.2 x 7.8 x 4.7 inches, Shipping Weight: 1.8 pounds, ASIN: B00EHKL73I, Item model number: Sirius, Date first listed on Amazon: November 20, 2013, Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 3.3 out of 5 stars 14 customer reviews
Target attributes: Shaft Height
Answer: attribute: shaft height
value: chukka
source: product title