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: Calvin Klein Men's Slim Fit Non Iron Textured Check Shirt
Product description: Long sleeve all cotton non iron Calvin Klein dress shirt
Product feature: 100% Cotton, Imported, Machine Wash, Spread collar, Regular cuff, No pocket, Package Dimensions: 13.5 x 6.4 x 2 inches, Shipping Weight: 10.4 ounces, ASIN: B01DKNFY9U, Item model number: 33K3061, Date first listed on Amazon: June 14, 2016, Average Customer Review: 5.0 out of 5 stars 1 customer review
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: long sleeve
source: product description