Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Dazzlingrock Collection 14K Gold Round Ruby & White Diamond Bridal Engagement Ring Set
Product description: This lovely engagement Bridal Ring feature ruby & white diamonds in prong setting. All stones are sparkling and 100% natural. All our products with FREE gift box and 100% Satisfaction guarantee. SKU # DR2936-1701-C
Product feature: Other ring sizes may be shipped sooner. Most rings can be resized., Items is smaller than what appears in photo. Photo enlarged to show detail, Satisfaction Guaranteed. Return or exchange any order within 30 days. Color may varies from photo. All our diamonds are conflict free., Color stone may have inclusions and external blemishes visible to the naked eye, Dazzlingrock 90 Day Warranty - We stand behind our products. If you lose an accent stone or your setting is damaged during NORMAL wear, we will fix it for FREE. Please read our About us page for more info, Package Dimensions: 2 x 2 x 1 inches, Shipping Weight: 1 pounds ( View shipping rates and policies ), ASIN: B00OB3IG30, Item model number: DR2936-1701-C-P, Date first listed on Amazon: January 1, 2011, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product price: $482.90 - $631.40
Target attributes: Silhouette
Answer: attribute: silhouette
value: engagement
source: product title
attribute: silhouette
value: engagement
source: product description
attribute: silhouette
value: bridal ring
source: product description