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: Womens Ballet Flats Ballerina Slippers Casual Slip On Shoes Ladies Faux Suede
Product description: Exude confidence and effortlessly chic style in the Refresh JULIA Flats. This timeless Faux Suede Comfort flat will become your go-to style for fabulous year round looks. Put on your favorite skinny jeans with these awesome flats and you'll have a timeless look in no time.
Product feature: Faux Suede, Heel measures approximately 0.5 inches", Product SKU: fresh-julia-yellow-8.5, Product Style Name: JULIA, Brand: Refresh, Shoe Width: Medium (B), Heel Height: Flat (0 to 1/2 in.), Shipping Weight: 2 pounds, ASIN: B00I3QSS3Y, Date first listed on Amazon: January 28, 2014, Average Customer Review: 4.0 out of 5 stars 1 customer review
Product brand: Refresh
Target attributes: Silhouette
Answer: attribute: silhouette
value: flat
source: product feature
attribute: silhouette
value: flats
source: product title
attribute: silhouette
value: ballet
source: product title
attribute: silhouette
value: flat
source: product description