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: Kenney Fabric Roller Light Filtering Window Shade, 31-1/4 by 64-Inch, Ecru
Product description: Light filtering beautiful decorative fabric. Easy cord free operation. Mounting brackets are included.
Product feature: Light Filtering, Cord Free Shades, Mounts inside or outside window
Product brand: Kenney
Target attributes: Shade Type
Answer: attribute: shade type
value: roller
source: product title