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: Cynthia Vincent Women's Olivia Ballet Flat
Product description: An open outer edge creates chic asymmetry in this lovely, pointed-toe ballet flat.
Product feature: 100% Leather, Imported, China, Leather sole, Heel measures approximately 0.25", An open outer edge creates chic asymmetry in this lovely, pointed-toe ballet flat., Package Dimensions: 12.3 x 6.2 x 4.3 inches, Shipping Weight: 1.7 pounds, ASIN: B00GBUKUJE, Item model number: Olivia, Date first listed on Amazon: December 2, 2013, Domestic Shipping: Item can be shipped within U.S., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 3.0 out of 5 stars 2 customer reviews
Product brand: Cynthia Vincent
Target attributes: Dance Shoe Style
Answer: attribute: dance shoe style
value: ballet
source: product description
attribute: dance shoe style
value: ballet
source: product title
attribute: dance shoe style
value: ballet
source: product feature