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: Mens Fleece Welly/Wellington Liner Socks (1 Pair)
Product description: Mens fleece welly liner socks. Designed for use with wellies, boots and waders. Thick cuff to prevent rubbing. Durable fleece for warmth, comfort and padding. 1 pair per pack. Available in sizes: US 7-9.5 (EUR 39-42), US 10-13 (EUR 42-45). 100% Polyester. Machine washable.
Product feature: Polyester, ,, Mens fleece welly liner socks., Designed for use with wellies, boots and waders., Thick cuff to prevent rubbing., Durable fleece for warmth, comfort and padding., 1 pair per pack., Shipping Weight: 7 ounces, ASIN: B01ACTYTBE, Item model number: UTMB416_6, Date first listed on Amazon: January 23, 2018, Average Customer Review: 3.8 out of 5 stars 5 customer reviews
Product brand: Universal Textiles
Target attributes: Style
Answer: attribute: style
value: None
source: None