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: 20"x 1.95" Mtb Bicycle Tyre
Product description: A high quality MTB Tread Tyre that will fit a 20" x 1.95, these are ideal for on/off road use and the PSI Rating is 35-60
Product feature: Aero Sport Tyre, Size 20" x 1.95, All weather tyre, Rides well on the mountain or road
Product price: $10.99
Product brand: Aero Sport
Target attributes: Style
Answer: attribute: style
value: None
source: None