Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Groucho Marxist White T-Shirt Men's Tee (6.1oz)
Product feature: This is an AUTHENTIC AM T-shirtsTM Brand product with removable Official Seal sticker, Printed in Tennessee, USA, 100% pre-shrunk cotton, 6.1oz Classic fit, Shipping Information: View shipping rates and policies, ASIN: B07CQ6PYP3, Item model number: Pr-E60E497E889D-PC61, Date first listed on Amazon: June 6, 2014, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product price: $19.00 - $27.00
Product brand: AM T-Shirts
Target attributes: Neckline
Answer: attribute: neckline
value: None
source: None