Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Booster Men's custom Tde T-shirt cotton short sleeve shirts for men
Product feature: ASIN: B01AVY9V18, Item model number: Booster00563, Date first listed on Amazon: January 21, 2016, Average Customer Review: 1.0 out of 5 stars 2 customer reviews
Product brand: Booster
Target attributes: Neckline
Answer: attribute: neckline
value: None
source: None