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: Bernardo Women's Peak Heeled Bootie
Product description: Bernardo is a maker of better womens footwear and handbags. Founded in 1947 by Bernard Rudofsky, the brand has a rich heritage that lives on to this very day. All Bernardo products are conceptually designed, and are crafted by hand with great attention to detail, in order to ensure quality, comfort, fit, and value.
Product feature: 100% Leather, Leather sole, Shaft measures approximately 6" from arch, Heel measures approximately 3 1/2", Boot opening measures approximately 9" around, Package Dimensions: 13.3 x 12.3 x 4.1 inches, Shipping Weight: 2.35 pounds, ASIN: B003TXSUCA, Item model number: Peak, Date first listed on Amazon: October 27, 2010, 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: Shaft Height
Answer: attribute: shaft height
value: bootie
source: product title