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: The North Face Ultra 50 GTX XCR Men's Graphite Grey/TNF Black-11
Product description: Take on the trail no matter what the conditions look like in The North Face's Ultra 50 GTX XCR running shoes. With a UltrATAC rubber outsole that grips through gravel and mud and a GORE-TEX liner that creates a barrier between you and the wet outside world, you maintain good footing and a high level of protection., The North Face launched their line of trekking and trail-running shoes to address the head-to-toe needs of those always striving for the next horizon. They are deeply proud to be the first choice of the world's most accomplished climbers, mountaineers, extreme skiers, snowboarders, endurance runners, and explorers. The North Face maintains an unwavering commitment to pushing the limits of design, so that you can push your limits outdoors. Never stop exploring.
Product feature: Package Dimensions: 13 x 9.2 x 4.7 inches, Shipping Weight: 2.34 pounds, ASIN: B0072F4IB8, Item model number: A1NJKQ4, Date first listed on Amazon: July 19, 2012, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: The North Face
Target attributes: Athletic Shoe Style
Answer: attribute: athletic shoe style
value: running shoes
source: product description