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: Ripple Junction Big Lebowski El Duderino Adult T-Shirt
Product description: Ripple Junction Officially Licensed Big Lebowski T-Shirt
Product feature: 50/50% Cotton Polyester, Machine Washable, Officially Licensed Big Lebowski T-Shirt, Product Dimensions: 12 x 9 x 1 inches, Shipping Weight: 9.6 ounces, ASIN: B00R87VSDG, Item model number: BLAS2231-HeatherCharcoal2X, Date first listed on Amazon: December 31, 2014, Average Customer Review: 4.5 out of 5 stars 5 customer reviews
Product brand: Ripple Junction
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: None
source: None