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: Akaash Mens Runway Model Short Sleeve Denim Button Up Shirt
Product description: All sizes are international sizing, which may be smaller than US sizing. We suggest measurement for a perfect fit. All measurement are in the bullet points above
Product feature: ASIN: B014GU4F3M, Item model number: AKAASHB45h, Date first listed on Amazon: August 26, 2015, Average Customer Review: 1.0 out of 5 stars 1 customer review
Product brand: Akaash
Target attributes: Fastening Style
Answer: attribute: fastening style
value: button up
source: product title