Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Tulip Tree Tees: Trainer with Attitude - Sinnoh T-shirt - Male Small - Black
Product description: Like this design? Visit www.tuliptreetees.com to see the whole Tulip Tree Tees catalog, featuring pop culture parodies and more. Happy shopping!
Product feature: Package Dimensions: 15 x 12 x 1 inches, Shipping Weight: 4.8 ounces, ASIN: B01AC9ZP9Y, Date first listed on Amazon: June 24, 2016, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Tulip Tree Tees
Target attributes: Fastening Style
Answer: attribute: fastening style
value: None
source: None