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: Volcom Men's Loc Tank
Product description: Keep your summer style on lock down all year round with this retro fit knit tank from Volcom. Designed with a chest pocket, off set front seam and custom dip dye treatment.
Product feature: 100% Cotton, Imported, Machine Wash, Retro fit tank, Front chest seam, Patch pocket, Small metal rivet, Product Dimensions: 13 x 10 x 1 inches, Shipping Weight: 4.2 ounces, ASIN: B00EARSWUO, Item model number: A0211415, Date first listed on Amazon: February 28, 2014, 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 2 customer reviews
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: tank
source: product title
attribute: sleeve style
value: tank
source: product feature
attribute: sleeve style
value: tank
source: product description