Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Suncloud Flutter Polarized Bi-Focal Reading Sunglasses
Product description: Light as a butterfly and a little bit sassy, the playful Flutter is full of fun for all your exploits. Customary features always included. Polarized polycarbonate lenses cut glare. The injected nylon frame highlights the lively prints and the loveable solid colors. Stylish rivet detail on the frame front complete Flutter's appeal.
Product feature: TR90 Grilamid frame, Polycarbonate lens, polarized, Lens width: 55 millimeters, POLARIZED Lens for the best in Optical Clarity, 100% UVA/UVB Protection, Microfiber cleaning/storage bag, 6 Base Lens Curvature, Lightweight Comfort, Shipping Information: View shipping rates and policies, ASIN: B074CLZ3HQ, Date first listed on Amazon: July 28, 2017, Average Customer Review: 4.4 out of 5 stars 33 customer reviews
Product price: $79.99
Product brand: Suncloud
Target attributes: Silhouette
Answer: attribute: silhouette
value: None
source: None