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

Input:
Product title: FOSTER GRANT "Lost" Women's Fashion Sunglasses
Product feature: Foster Grant Sunglasses, Fashion design, MaxBlock, ASIN: B00OO2CTX6, Item model number: 3755010, Date first listed on Amazon: October 19, 2014, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Foster Grant
Target attributes: Silhouette
Answer: attribute: silhouette
value: None
source: None