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: GRACE KARIN Women Summer Sleeveless Long Club Dresses
Product description: Please check the size chart on the left pictures before ordering, thank you. CL9717 Half Sleeve V-Neck Full Length Split Design Empire line, a special belted bowknot back design which shapes your slim figure. CL9648 Sleeveless Round Neck Full Length Black, Blue, Red Perfect for Ball, Party, Cocktail, Prom, Wedding, Dancing and other Occasions. SERVICE: Any questions or problems to our products or service, please feel free to contact us, we will always at your services. Every dress in this store has been checked carefully to avoid some problems. Enjoy your shopping!
Product feature: Please check our Size Chart on the left pictures carefully before ordering, CL9648Sleeveless, Round Neck, Floor Length, Black/Blue/Red, CL9717Half Sleeve, V-Neck, Full-Length, Bowknot Back, Perfect for Cocktail Party, Proms, Celebrity, Clubwear, Dating and other Occasions, More girls and boys clothings, accessories, women maternity tops, dresses and so on available in our, Shipping Information: View shipping rates and policies, ASIN: B078HLRY3T, Date first listed on Amazon: December 19, 2017, Average Customer Review: 4.0 out of 5 stars 165 customer reviews
Product price: $15.99 - $23.99
Target attributes: Neckline
Answer: attribute: neckline
value: round neck
source: product description
attribute: neckline
value: round neck
source: product feature