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: John Varvatos Star USA Men's Soft Collar Polo Shirt with Embroidery
Product description: Soft collar peace polo with peace sign embroidery on chest and contrast vertical stitch details
Product feature: 100% Cotton, Imported, Machine Wash, Slim-fit polo shirt in stripes featuring three-button placket and short sleeves, Package Dimensions: 11 x 7 x 1.2 inches, Shipping Weight: 12 ounces, ASIN: B00SCX4ZLW, Item model number: K1381R1B AZF5B, Date first listed on Amazon: February 24, 2015, Domestic Shipping: Item can be shipped within U.S., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 4.0 out of 5 stars 1 customer review
Target attributes: Neckline
Answer: attribute: neckline
value: polo shirt
source: product feature
attribute: neckline
value: polo shirt
source: product title
attribute: neckline
value: polo
source: product description