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: Sean John Men's Big-Tall Long Sleeve Alpha Constructed French Terry Crew Top
Product description: Sean John long sleeve alpha constructed French terry crew neck knit top. Coated French terry angular panel on chest. Contrast color angular piecing throughout garment. Ribbed collar, sleeve end and bottom hem.
Product feature: 60% Cotton/40% Polyester, Imported, Machine Wash, Sean John long sleeve alpha constructed French terry crew neck knit top. Coated French terry angular panel on chest, Contrast color angular piecing throughout garment. Ribbed collar, sleeve end and bottom hem, Package Dimensions: 13.7 x 12.3 x 4.3 inches, Shipping Weight: 1.15 pounds, ASIN: B010S6ONCQ, Item model number: 28FK152525, Date first listed on Amazon: September 18, 2015, Average Customer Review: 4.0 out of 5 stars 1 customer review
Target attributes: Neckline
Answer: attribute: neckline
value: crew neck
source: product feature
attribute: neckline
value: crew neck
source: product description
attribute: neckline
value: ribbed collar
source: product feature
attribute: neckline
value: ribbed collar
source: product description