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: iLover Hepburn Women 1950s Vintage Polka Dot Rockabilly Halter Dress
Product description: iLover Hepburn Women 1950s Vintage Polka Dot Rockabilly Halter Dress New And Tagged. This Size Information Is Just For Reference Only,And Allow 1-2cm (0.4-0.8") Differences Due To Manual Measurement
Product feature: 100% Cotton, Classic and iconic style that will never be out of fashion., Material: 97% Cotton, Large Hem. This swing dress has a really 360 degree full skirt., Please check the size chart on Product Description below and choose the best one for you!, It's great vintage dress for daily casual, formal party, dating, banquet, special occasion and so on, Package Dimensions: 10.9 x 9.8 x 1.2 inches, Shipping Weight: 8.8 ounces, ASIN: B015IK0GHS, Item model number: V030Y-15, Date first listed on Amazon: September 18, 2015, Average Customer Review: 4.6 out of 5 stars 2 customer reviews
Product brand: iLover
Target attributes: Pattern
Answer: attribute: pattern
value: polka dot
source: product title
attribute: pattern
value: polka dot
source: product description