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: Hot Air Balloon Brass Stud Earrings (Minimalist Geometric Genuine Gold Plated Hand Painted Jewelry RSN4586-E)
Product description: Let this hot air balloon take you on a fun ride to style. These beautiful earrings will give your outfit life. Wear it with a plain shirt or a trendy top. We try to keepeverything in stock for fast shipping. If something is out of stock we will contact youand tell you when stock will arrive. Customerservice andsatisfaction is very important to us.
Product feature: Lovingly hand painted 20 kt gold plated hypo allergenic brass earrings, 0.5 in X 0.8 in stud earrings, Individually packaged with care, Comes on a special story card, Gift boxed, Shipping Information: View shipping rates and policies, ASIN: B00ZDVFSS0, Item model number: RSN4586-E, Date first listed on Amazon: June 10, 2015, Average Customer Review: 5.0 out of 5 stars 2 customer reviews
Product price: $12.00
Product brand: Lauren-Spencer
Target attributes: Silhouette
Answer: attribute: silhouette
value: stud
source: product feature
attribute: silhouette
value: stud
source: product title