Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Polo Ralph Lauren Men's Vaughn Madras Lace-Up Sneaker
Product description: Classic and authentic, Polo is the foundation of the world of Ralph Lauren menswear, combining the time-honored aesthetic of East Coast Ivy League casual style with proper English refinement. Often imitated but never matched, Polo is a true symbol of the preppy lifestyle. The iconic polo player logo is recognized worldwide as a symbol of heritage and authenticity.
Product feature: 100% Leather and fabric, Synthetic sole, Package Dimensions: 13.4 x 8.1 x 4.9 inches, Shipping Weight: 2.3 pounds, ASIN: B00669BMV0, Item model number: Vaughn madras/leather, Date first listed on Amazon: October 4, 2005, 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 2 customer reviews
Product brand: Polo Ralph Lauren
Target attributes: Shaft Height
Answer: attribute: shaft height
value: None
source: None