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: VANELi Women's Arela Slip-On Loafer
Product description: A classic penny loafer silhouette is modernized with a two contrasting tones and sporty flair., For the latest in high fashion footwear, Vaneli is the brand to watch. Boasting a variety of styles, Vaneli offers the perfect complement to any eveningwear. With a mind on fashion and an eye on comfort, these shoes deliver a perfect blend of long-wearing style.
Product feature: 100% Leather, Imported, Rubber sole, A classic penny loafer silhouette is modernized with a two contrasting tones and sporty flair., Package Dimensions: 11.6 x 6.2 x 4.1 inches, Shipping Weight: 1.1 pounds, ASIN: B00EHHCBMW, Item model number: Arela, Date first listed on Amazon: January 21, 2014, Domestic Shipping: Item can be shipped within U.S., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 3.5 out of 5 stars 4 customer reviews
Product brand: VANELi
Target attributes: Silhouette
Answer: attribute: silhouette
value: loafer
source: product title
attribute: silhouette
value: penny loafer
source: product description
attribute: silhouette
value: loafer
source: product description
attribute: silhouette
value: loafer
source: product feature