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: Dr. Martens Women's 1914 14-Eye Casual Boot Cherry 7 M UK
Product feature: ASIN: B00HZBBD1M, Date first listed on Amazon: February 17, 2017, Average Customer Review: 5.0 out of 5 stars 1 customer review
Target attributes: Style
Answer: attribute: style
value: casual
source: product title