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: Derek Zoolander Center for Kids Who Can't Read Good T-Shirt
Product feature: Professionally printed silkscreen, High-quality, 100% preshrunk cotton tee, Designed and printed in the USA, Package Dimensions: 9.5 x 4.9 x 1.7 inches, Shipping Weight: 11.2 ounces, ASIN: B00UM5IL0E, Date first listed on Amazon: March 12, 2015, Average Customer Review: 2.9 out of 5 stars 6 customer reviews
Target attributes: Neckline
Answer: attribute: neckline
value: None
source: None