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: 10K Yellow Gold Natural Lapis Ring Oval 10x8mm Blue Sapphire Accent, sizes 5 - 10
Product description: Expertly crafted from Gold, this Ring is truly a jewel to have. Smooth and Glossy oval shaped Gemstone adorned with Genuine Sapphires in Deep Blue shade on each side. Would be a wonderful gift for that special someone or yourself. Comes in sizes 5 to 10.
Product feature: Solid 10K Gold, Naturally-vibrant, superior quality color gemstone, Excellent quality and workmanship, Shipping Information: View shipping rates and policies, ASIN: B00HCQGRQ6, Date first listed on Amazon: December 16, 2013, Average Customer Review: 4.7 out of 5 stars 2 customer reviews
Product price: $209.74
Product brand: Silver City Jewelry
Target attributes: Silhouette
Answer: attribute: silhouette
value: None
source: None