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: Sterling Silver Dark Blue Murano Glass Oval Bead Millefiori Earrings
Product description: A vibrant combination of Dark Blue, Light Blue, Yellow, and White colors are set in flower and swirl shapes forming a breathtaking Millefiori meaning thousand flowers Italian design. The Stylish Murano Glass bead shape and beautiful silver bead makes the
Product feature: ASIN: B000J4KLU6, Item model number: E9096M2, Date first listed on Amazon: December 26, 2006, Average Customer Review: 3.0 out of 5 stars 1 customer review
Product brand: SilverSpeck.com
Target attributes: Silhouette
Answer: attribute: silhouette
value: None
source: None