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: Birkenstock Boston High Arch Clog,Steel Grey Suede,39 M EU
Product description: This is the real deal. Cork, leather, a buckle or two: these are the simple ideas that have made feet happy for over two hundred years, and that's the original Birkenstock. These shoes are made in Germany since 1774. No smoke, no mirrors, and no gizmos are needed. You walk, the shoe molds to your foot. The shape of the Original Birkenstock Footbed enables body weight to be distributed evenly over the whole foot, providing it with optimal support.
Product feature: 100% Suede, Synthetic sole, Heel measures approximately 3/4", Platform measures approximately 1/2", Cushioned signature Birkenstock footbed, The classic Birkenstock clog, Adjustable strap, Shock-absorbing sole, Please see Sizing Chart for US size conversions, Package Dimensions: 12.3 x 8.9 x 4.4 inches, Shipping Weight: 1.75 pounds, ASIN: B000OCTUBO, Item model number: 16033, Date first listed on Amazon: October 26, 2007, Domestic Shipping: Item can be shipped within U.S., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Birkenstock
Target attributes: Type
Answer: attribute: type
value: shoes
source: product description
attribute: type
value: shoe
source: product description