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: Regal Home Collections Sadie 54-Inch X 84-Inch Metallic Blackout Grommet Panel, Gray
Product description: Bring modern style and function to your home. The Sadie blackout curtain has beautiful metallic accents woven thoughout each panel to give your room a new modern look. It will also offer you the function of both blocking outside light and reducing outside noise. Energy saving to help save on heating bills in the cold weather and cooling costs in the hot weather. 100percent polyester, easy to hang. Easy care.
Product feature: 100% Polyester, Imported, Measures 54-Inch wide x 84-inch long, Woven with beautiful metallic accents, Block Outside light. Reduce noise. This blackout curtain will help reduce heating and air conditioning costs, Grommet top for easy installation. Fits curtain rod up to 1.5in diameter, Panels are sold separately, not as pairs
Product price: $33.75
Product brand: Regal Home Collections
Target attributes: Light Allowance
Answer: attribute: light allowance
value: blackout
source: product feature
attribute: light allowance
value: blackout
source: product title
attribute: light allowance
value: blackout
source: product description