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 Slipknot If You Are 555 Then I'm666 Cotton T-Shirt Black
Product feature: ASIN: B01H4Z4HG6, Date first listed on Amazon: June 16, 2016, Average Customer Review: 1.0 out of 5 stars 1 customer review
Product brand: Unknown
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: None
source: None