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: BBCrafts Black 120 Inch Round Tablecloths
Product description: Black 120 Inch Round Tablecloths, Ships Within 48 Hours, Guaranteed Quality Products
Product feature: Ship in 1 Business Day, 30 Days Return and Exchange Policy, Easy Return Process, Guaranteed Product Quality, With More than 100000 registered customers, BBCrafts is your safest and most reliable source of supply when it comes to ribbon, tulle, tablecloths, fabrics, wedding decorations supplies, craft supplies and party favors.
Product brand: BBCrafts
Target attributes: Shape
Answer: attribute: shape
value: round
source: product description
attribute: shape
value: round
source: product title