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: The Mountain Three Wolf Moon Short Sleeve T-Shirt
Product feature: Product Dimensions: 9 x 6 x 0.5 inches, Shipping Weight: 5.6 ounces, ASIN: B007I4HIY2, Date first listed on Amazon: March 7, 2012, Average Customer Review: 5.0 out of 5 stars 3 customer reviews
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: short sleeve
source: product title