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: Skechers SK91664 School Shoes/Boys Shoes
Product description: Smooth casual style is achieved with the Urbantrack 2 Rage boys shoes. Synthetic faux Leather upper. Oxford style dress shoe. Perfect for back to school wear. Stitching and overlay accents. Padded collar and tongue for comfort. Cushioned insole. Shock absorbing midsole. Cleated traction outsole.
Product feature: Mixed, ,, Smooth casual style is achieved with the Urbantrack 2 Rage boys shoes., Synthetic faux Leather upper., Oxford style dress shoe., Perfect for back to school wear., Stitching and overlay accents., Shipping Weight: 2.2 pounds, ASIN: B00MJPZBJ4, Item model number: UTFS2420_9, Date first listed on Amazon: March 10, 2015, Average Customer Review: 3.6 out of 5 stars 2 customer reviews
Target attributes: Style
Answer: attribute: style
value: casual
source: product feature
attribute: style
value: casual
source: product description