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: Kenneth Cole Unlisted Men's Big Up Street Casual Shoe
Product description: Unlisted from Kenneth Cole footwear combines youthful fashion trends at an affordable price. With different shoes for dress, work and leisure, Unlisted makes the most up-to-the minute styles for the fashion-loving shopper.
Product feature: 100% Leather, Synthetic sole, Durable TPR outsole, Built in padded sock for added comfort, Package Dimensions: 12 x 7.5 x 4 inches, Shipping Weight: 2 pounds, ASIN: B000F5OXI0, Date first listed on Amazon: July 11, 2006, 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
Product brand: Unlisted by Kenneth Cole
Target attributes: Style
Answer: attribute: style
value: casual
source: product title