Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Champion Men's Ultimate Double Dry Long Sleeve Polo # H143
Product description: Champion Men's Ultimate Double Dry Long Sleeve Polo
Product feature: 100% Polyester, athletic-shirts closure, Rib knit collar. 2-button placket. Logoed necktape and side vents., 2-needle stitched body and bottom hem., Wicks moisture away from the body and helps control moisture buildup., C logo left sleeve and Champion script back neck., Fiber Content: Body: 100% Polyester Micro Knit; Rib Collar: 100% Polyester 1x1 Rib, Shipping Weight: 1 pounds ( View shipping rates and policies ), ASIN: B00B2B288S, Item model number: H143, Date first listed on Amazon: January 17, 2013, Average Customer Review: 5.0 out of 5 stars 2 customer reviews
Product price: $8.00
Target attributes: Neckline
Answer: attribute: neckline
value: polo
source: product description
attribute: neckline
value: polo
source: product title