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

Input:
Product title: Men's V-Neck The Godfather Italian Colors T-shirt L
Product feature: ASIN: B01EG3GCWQ, Date first listed on Amazon: March 26, 2016, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Jkfog
Target attributes: Shoulder Style
Answer: attribute: shoulder style
value: None
source: None