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: Aishang Graffiti Hip-hop Men's Sleeve t-Shirt Clothes Casual Man Short Sleeve
Product description: Description Size: S: Bust:90cm, Length:65cm; M: Bust:94cm, Length:66cm; L: Bust:98cm, Length:67cm; XL: Bust:102cm, Length:68cm; Specialize in fashion clothing online store|aishang The most fashion and coolest, exciting, lots of categories - this is aishang! We draw inspiration from global fashion trends, bring you the most avant-garde design, allows your wardrobe easily integrate global fashion! Good price, best quality and timely efficient service make us become the most popular international retailers!
Product feature: Round Neck, Material: Cotton, Washing Method: Machine wash / Hand wash / do not bleach, Style:Hip-Hop/Leisure/Fashion, Still do not know which size to choose? Please refer to our size chart before making order. Thanks!, ASIN: B00ZERSFBU, Date first listed on Amazon: June 11, 2015, Average Customer Review: 1.4 out of 5 stars 3 customer reviews
Product brand: Aishang
Target attributes: Fastening Style
Answer: attribute: fastening style
value: None
source: None