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: Wellcoda Anonymous Anarchy Men XXL V-Neck T-shirt
Product feature: ASIN: B01GII5LAQ, Date first listed on Amazon: August 3, 2016, Average Customer Review: 3.1 out of 5 stars 2 customer reviews
Target attributes: Neckline
Answer: attribute: neckline
value: v-neck
source: product title