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: .925 Silver Marquise Simulated Sapphire CZ Engagement Ring
Product description: Featuring a spectacular 2ct marquise cut blue sapphire colored center stone in a sterling silver 6 prong setting, our engravable inspired by antique engagement ring is adorned with princess and baguette cut side stones in a bar setting. These September birthstone rings are terrific to give as personalized gifts for women and become extra sentimental when you add some custom engraving on it. Let her say I do to this stunning blue cz sapphire engagement ring.
Product feature: Indulge your September born beloved with this simply sublime, vintage inspired engagement ring. Accented by an arresting marquise cut simulated sapphire center stone complemented by baguette cut cz crystals on sides and finished in .925 silver., Stone: 13 mm W, Material: .925 Sterling Silver, Cubic Zirconia, Measure: 3mm Band Width, Weight: 7 grams, Show your love for the Earth and your sweetheart by choosing a cubic zirconia engagement ring. Lab created cz reduces destructive impact caused by the mining of diamonds, and is virtually flawless. Pour out your heart instead of your wallet and splurge on a trip or new house., Free elegant black velvet pouch, worry free travel option, leave your diamond home. Gift as promise ring, Anniversary, Wedding, Birthday, Christmas, Valentines Day, Wife, Bride, Girlfriend, Female Friend or Treat Yourself, 30 Days Money Back Guarantee combined with world class customer service no question asked. Bling jewelry offers best quality without compromise. We individually inspect each of our products, to make sure you are only getting the very best from us., Package Dimensions: 2.2 x 2.2 x 0.7 inches, Shipping Weight: 0.32 ounces ( View shipping rates and policies ), ASIN: B07CRGX2KD, Item model number: CL-W-8129, Date first listed on Amazon: April 1, 2010, Average Customer Review: 3.6 out of 5 stars 5 customer reviews
Target attributes: Silhouette
Answer: attribute: silhouette
value: engagement
source: product title
attribute: silhouette
value: engagement
source: product feature
attribute: silhouette
value: engagement
source: product description