Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Cafe Bel Etage 15 Ct Roasted by Illy AG (Swiss) Dark Roast Napoli Blend Single Serve For Keurig K-Cup Brewers
Product description: Free shipping! The $7.50 charge will be deducted at checkout. Beverage Enterprise of North America introduces their popular Bel Etage Napoli dark roast coffee packed in a new, innovative single serve coffee filter. The filters are compatible with many popular home and office single serve or K-Cup coffee systems and are recyclable. The filter called the Upshot Solution (TM) changes the dynamic of the coffee extraction resulting in an unsurpassed quality in a single serve cup of coffee. In fact, you can see the coffee and & smell the brew the moment you open the fresh seal. * KEURIG is a registered trademark of Keurig, Inc., which is not affiliated or associated with Silver Service Refreshment Systems., Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.
Product brand: Caf Bel Etage
Target attributes: Roast
Answer: attribute: roast
value: dark roast
source: product description
attribute: roast
value: dark roast
source: product title