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: Kettlebell Skull Men's Tank Top
Product description: Perfect to wear at home or out on the town. The back of the garment is blank. The garment is Fully Machine Washable.
Product feature: 100% PreShrunk Cotton for a Cool Comfortable Fit, Fully Machine Washable, For best results, machine wash inside out on cold and tumble dry on low, Designed, printed, and shipped from the United States, Shipping Information: View shipping rates and policies, ASIN: B07BMV9TZ4, Date first listed on Amazon: February 10, 2015, Average Customer Review: 4.5 out of 5 stars 5 customer reviews
Product price: $8.95
Product brand: Tcombo
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: tank top
source: product title