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: Retro Polka Dot Paper Guest Napkins, 24ct
Product description: Create a fun and colorful powder for guests at a New Year's Eve party with these Retro Polka Dot Paper Guest Towels. These convenient paper guest napkins are a great addition to the powder room for guests to wipe their hands or can be used as large dinner napkins. Coordinate with other retro polka dot tableware for a vibrant celebration.
Product feature: Package of 24 Retro Polka Dot Paper Guest Towels, Retro Dot Guest Napkins measure 7.75" x 4.25", Keep in the powder room for guests to dry their hands or use as large dinner napkins, Add fun color to a birthday party, New Year's Eve party, engagement party, 70s theme party, or disco party, Coordinate with other Retro Polka Dot party supplies and party decorations from Unique
Product brand: Unique
Target attributes: Ply
Answer: attribute: ply
value: None
source: None