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: Polished Puffed Heart Stud earrings 925 Sterling Silver 8mm
Product feature: Don't wear your heart on your sleeve, wear it on your ears with these puffy, polished sterling silver 8mm stud earrings. These earrings are perfect for lovebirds with pierced ears., Measure: 8mm x 10mm Weight: 1.2 Grams Material: .925 Sterling Silver, Material: .925 Sterling Silver, Free elegant black velvet pouch, earrings make a great gift for Mothers Day, Anniversary, Wedding, Birthday, Christmas, Valentines Day, Graduation Gift for Sister, Mother, Mom, Grandmother, Daughter, Wife, Girlfriend, Aunt, Mum, Grandma, 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., You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition., Read the full returns policy, Go to Your Orders to start the return, Print the return shipping label, Ship it!, Don't wear your heart on your sleeve, wear it on your ears with these puffy, polished sterling silver 8mm stud earrings. These earrings are perfect for lovebirds with pierced ears., Measure: 8mm x 10mm, Weight: 1.2 Grams, Material: .925 Sterling Silver., Package Dimensions: 2.4 x 2.1 x 0.7 inches, Shipping Weight: 0.8 ounces ( View shipping rates and policies ), ASIN: B00AQZOCZ8, Item model number: PMR-S10086, Date first listed on Amazon: December 27, 2012, Average Customer Review: 4.5 out of 5 stars 11 customer reviews
Product price: $12.99
Target attributes: Silhouette
Answer: attribute: silhouette
value: stud
source: product feature
attribute: silhouette
value: stud
source: product title