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: Calvin Klein Jeans Men's Loop-Print Short-Sleeve Woven Shirt
Product description: This is a Calvin Klein jeans short sleeve button down with double chest pockets.
Product feature: 100% Cotton, Imported, Machine Wash, Button-front shirt featuring flap pockets at chest and classic collar, Package Dimensions: 8.9 x 8.8 x 1.7 inches, Shipping Weight: 7.2 ounces, ASIN: B00U78BIRO, Item model number: 41LW103, Date first listed on Amazon: May 23, 2015, Average Customer Review: 4.0 out of 5 stars 3 customer reviews
Target attributes: Neckline
Answer: attribute: neckline
value: classic collar
source: product feature
attribute: neckline
value: button down
source: product description