Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Marvel Boys' Avengers Logo Flatback Mesh Sublimated Front
Product description: Avengers logo flat back mesh sublimated front sleeve insert long sleeve tee
Product feature: 100% Polyester, Imported, Machine Wash, Long sleeve tee, Big boys, Package Dimensions: 10 x 4.4 x 1.6 inches, Shipping Weight: 4.8 ounces, ASIN: B012I3HVHG, Item model number: K-AA187IES, Date first listed on Amazon: October 16, 2015, Average Customer Review: 3.7 out of 5 stars 6 customer reviews
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: long sleeve
source: product description
attribute: sleeve style
value: long sleeve
source: product feature