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: Ladies R-Tek(R) Fleece Vest (up to size 2X)
Product feature: ASIN: B0028NSLFI, Date first listed on Amazon: May 4, 2009, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Bigmansland
Target attributes: Pattern
Answer: attribute: pattern
value: None
source: None