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: Air Balance Hi Cut Casual Athletic Shoes -Black
Product description: Fashion Sneakers
Product feature: Synthetic, Rubber sole, Air Balance Authentic, Brand New Box, Made In China, Lace up casual comfort, Package Dimensions: 12.4 x 8.8 x 4.4 inches, Shipping Weight: 2.05 pounds, ASIN: B0186FHTWM, Item model number: AB3986BK-M-10, Date first listed on Amazon: November 18, 2015, Average Customer Review: 1.0 out of 5 stars 1 customer review
Product brand: Air Balance
Target attributes: Style
Answer: attribute: style
value: casual
source: product title
attribute: style
value: fashion sneakers
source: product description
attribute: style
value: casual
source: product feature