Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: A Flock Of Seagulls The Best Soundtrack Mens Round Neck Cute Shirt Green
Product feature: ASIN: B01HAQLKSW, Date first listed on Amazon: June 20, 2016, Average Customer Review: 2.0 out of 5 stars 1 customer review
Product brand: Shac
Target attributes: Neckline
Answer: attribute: neckline
value: round neck
source: product title