Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Men's DC Comics Original Batman T-Shirt Black 4XL
Product feature: Importado, QUICKLY, ASIN: B01FEAZKS2, Date first listed on Amazon: December 6, 2013, Average Customer Review: 3.3 out of 5 stars 3 customer reviews
Product brand: Trevco
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: None
source: None