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: U.S. Polo Assn. Men's Vertical Stripe Polo Shirt
Product feature: 100% Cotton, Imported, Button closure, Machine Wash, Under collar and cuff rib striped, Logo woven patch, embroidery and appliques, Classic fit, Package Dimensions: 11.7 x 7.1 x 2.2 inches, Shipping Weight: 12.8 ounces, ASIN: B00XLQEV2S, Item model number: 11-3180-88-WHWN-M, Date first listed on Amazon: July 28, 2015, Average Customer Review: 4.2 out of 5 stars 10 customer reviews
Product brand: U.S. Polo Assn.
Target attributes: Neckline
Answer: attribute: neckline
value: polo
source: product brand
attribute: neckline
value: polo shirt
source: product title
attribute: neckline
value: polo
source: product title