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: Penelope Vintage 1950s Polka Dot Shirt Swing Tea Dress (US4, Black&White PolkaDot)
Product description: Pls visit our store for more wonderful vintage inspired dresses! The standard shipping time is about 10 business days for US, Europe and Asia, instead of 17 - 28 business days on Amazon fixed shipping template. Item: Penelope Vintage 1950s Polka Dot Shirt Swing Tea Dress Fabric: 97% Cotton 3% Spandex Scenes: Retro Rockabilly Pinup 50s Lining: No The dress is made from a high quality cotton, it's comfortable and easy to wear. Button to waist shirt style bodice and flared skirt. The dress comes with a tie belt. Pls get measured before placing an order. You could measure your bust by this ways: Only wear a bra, pull tape across the fullest part of the bust, so you could get your bust size. For example, if your bust is about 32, so you could choose size US6 below, US4: Bust- 30". Waist- 24". Length- 41". US6: Bust- 32". Waist- 26". Length- 41". US8: Bust- 34". Waist- 28". Length- 41". US10: Bust- 36". Waist- 30". Length- 41". US12: Bust- 38". Waist- 32". Length- 42". US14: Bust- 40". Waist- 34". Length- 42". US16: Bust- 42". Waist- 36". Length- 42". US18: Bust- 44". Waist- 38". Length- 42". This dress has been tagged so that it cannot be worn without the tag showing.This is to prevent people from wearing the dress for a night out and then retruning it.The tag will be easily removable if you decide to keep the dress. All returns must be within 5 days of when the shipment was dropped off from the carrier.
Product feature: 97% COTTON 3% ELASTANE, Retro Rockabilly Pinup 50s, Pls visit our store for more wonderful vintage inspired dresses!, Shipping Weight: 1 pounds, ASIN: B0117SZFGW, Date first listed on Amazon: July 8, 2015, Average Customer Review: 2.0 out of 5 stars 1 customer review
Product brand: Penelope Vintage
Target attributes: Pattern
Answer: attribute: pattern
value: polka dot
source: product description
attribute: pattern
value: polka dot
source: product title
attribute: pattern
value: polkadot
source: product title