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: WalterDrake Starburst Rug
Product description: Add soft warmth to hard floors while updating the look of any room. Starburst rug combines modern, abstract design with easycare floor protection. Choose from 4 colors to complement any decor: brown, burgundy, blue or green. Durable, 100 olefin hallway rug features finished edges and a nonslip latex backing to keep rug in place, even in high traffic areas. Runner rug is available in 3 sizes to fit any space. Machine wash cold, gentle; tumble dry, no heat.
Product feature: Made with 100% olefin, Available in 3 sizes to fit any space, Finished edges and non-slip latex backing helps prevent trips and falls, Machine wash
Product price: $4.65
Product brand: WalterDrake
Target attributes: Construction
Answer: attribute: construction
value: None
source: None