Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Emuna Womens Faux Leather Ballerina Ballet Flats Shoes W/Chain (5, Beige 5059)
Product description: Womens Faux Leather Ballerina Ballet Flats Shoes W/Chain Great for a night on the town or a a day at the office these stylish flats come in 3 great colors.
Product feature: Easy Slip On Style, Very Comfortable, Very Stylish, ASIN: B00BIOH1FO, Date first listed on Amazon: February 20, 2013, Average Customer Review: 1.0 out of 5 stars 1 customer review
Product brand: Emuna
Target attributes: Silhouette
Answer: attribute: silhouette
value: ballet
source: product title
attribute: silhouette
value: ballet
source: product description
attribute: silhouette
value: flats
source: product description