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: 14k Yellow Gold 3mm Thickness Hoop Earrings (24mm Diameter)
Product description: Light up any occasion with these Beautiful 14K Gold Earrings. These earrings are finished to give off more shine and luster by reflecting surrounding light. Combined with high polished gold, this set is a guaranteed hit at any event. Comfort, class, and practical are words to describe these earrings. Order this today or browse our incredible selection of affordable fine gold jewelry.
Product feature: Size : 24 X 24 mm, FREE standard shipping, Will be Shipped Today or Tomorrow, Promptly Packaged with Free Gift Box, Package Dimensions: 1 x 1 x 1 inches, Shipping Weight: 1 pounds, ASIN: B0118HHQMI, Item model number: ER1028, Date first listed on Amazon: July 9, 2015, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: The World Jewelry Center
Target attributes: Silhouette
Answer: attribute: silhouette
value: hoop
source: product title