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: Rebecca Minkoff Pave Spike Stud Earrings
Product feature: Made in China, Gold, rhodium, or rose gold plated stud earring with clear pav, post with friction back, Remove when showering, swimming, or exercising. Store in protective pouch. Designed in New York, Made in China., Imported, 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!, Package Dimensions: 3.8 x 3.2 x 0.7 inches, Shipping Weight: 0.32 ounces ( View shipping rates and policies ), ASIN: B01HI8VXUM, Item model number: 05793712K107, Date first listed on Amazon: August 12, 2016, Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 4.0 out of 5 stars 1 customer review
Product price: $48.00
Target attributes: Silhouette
Answer: attribute: silhouette
value: stud
source: product feature
attribute: silhouette
value: stud
source: product title