Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Mohem Men's Premium Genuine Leather Fashion Slipper Casual Slip On Loafers Shoes(16812Blue47)
Product feature: Package Dimensions: 12.7 x 4.7 x 4.7 inches, Shipping Weight: 1.6 pounds, ASIN: B01F04R4B8, Date first listed on Amazon: July 18, 2016, Average Customer Review: 3.2 out of 5 stars 6 customer reviews
Product brand: MOHEM
Target attributes: Sandal Style
Answer: attribute: sandal style
value: None
source: None