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: Teenage Mutant Ninja Turtles Men's Briefly Stated Knit Boxer, Multi, Medium
Product feature: 100% Cotton, Machine Wash, Sublimated print, Elastic waist, Package Dimensions: 8.1 x 4.9 x 1.9 inches, Shipping Weight: 3.04 ounces, ASIN: B00DWBHFXE, Item model number: 17NJ112BXMKZA-P12, Date first listed on Amazon: September 9, 2013, Domestic Shipping: Item can be shipped within U.S., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Teenage Mutant Ninja Turtles
Target attributes: Pattern
Answer: attribute: pattern
value: None
source: None