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: Lilac Stretch Denim Pencil Skirt
Product description: Stretchy denim is sure to make this pencil skirt your new best friend. Clean lines, dark washed denim, and a spandex panel make this skirt a perfect addition to your wardrobe. 78% Cotton, 20% Polyester, 2% Spandex Lilac?s Denim Size Chart:XS: size 2-4S: size 6-8M: size 8-10L: size 12-14XL: size 14-16
Product feature: Super stretchy with an attached tummy panel, functional front and back pockets, above knee length, Extra stretchy denim that doesn't "stretch out", retains shape perfectly, Package Dimensions: 9 x 8.4 x 2.6 inches, Shipping Weight: 12 ounces, ASIN: B00KN4021U, Item model number: 577-DEN-M, Date first listed on Amazon: May 29, 2014, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Lilac
Target attributes: Length
Answer: attribute: length
value: pencil
source: product description
attribute: length
value: pencil
source: product title