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: 4How Men's Oxfords Casual Shoes Cordury Black US Size 9.5
Product feature: Importado, Package Dimensions: 12.4 x 7.9 x 3.2 inches, Shipping Weight: 1.7 pounds, ASIN: B01DNRIUTE, Item model number: S22624195c0444, Date first listed on Amazon: September 6, 2016, Average Customer Review: 4.0 out of 5 stars 3 customer reviews
Product brand: 4HOW
Target attributes: Boot Style
Answer: attribute: boot style
value: None
source: None