Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Broadmix Women's Woolen Plaid Wide Leg Vintage Ninth Pants
Product description: Women's Woolen Plaid Wide Leg Vintage Ninth Pants Size:Asian sizes,Tile sizes,please carefully check the sizes.
Product feature: Fabric:cotton.Made in China.Per package includes one pair of pants., Please wash separately to avoid dyeing,hand wash,hand dry, Manual measurement,there maybe a little difference of the size, Art style ninth pants wide leg pants,vintage plaid., High quality material,soft,warm and comfortable.Fashion design., ASIN: B019SZ9IOG, Date first listed on Amazon: December 25, 2015, Average Customer Review: 1.0 out of 5 stars 1 customer review
Product brand: Broadmix
Target attributes: Pattern
Answer: attribute: pattern
value: plaid
source: product description
attribute: pattern
value: plaid
source: product title
attribute: pattern
value: plaid
source: product feature