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

Input:
Product title: Rocket Dog Louis Chunky Biker Ankle Boot - Black, Dark Brown
Product feature: Package Dimensions: 12.4 x 11.7 x 4.4 inches, Shipping Weight: 2.65 pounds, ASIN: B00K0B1G34, Item model number: Louis, Date first listed on Amazon: November 26, 2015, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Rocket Dog
Target attributes: Boot Style
Answer: attribute: boot style
value: None
source: None