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: Stuff4® Men's Round Neck T-Shirt/Jamaica/Jamaican Flag Splat/CS
Product feature: Shipping Weight: 5.3 ounces, ASIN: B01EXAAEJO, Date first listed on Amazon: April 27, 2016, Average Customer Review: 4.0 out of 5 stars 1 customer review
Product brand: Stuff4
Target attributes: Neckline
Answer: attribute: neckline
value: round neck
source: product title