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: Calvin Klein Women's Whinnie Black Pump 7.5 M
Product feature: Package Dimensions: 10.8 x 7.9 x 3.9 inches, Shipping Weight: 1.55 pounds, ASIN: B016XA83AO, Date first listed on Amazon: July 8, 2016, Average Customer Review: 2.0 out of 5 stars 1 customer review
Target attributes: Style
Answer: attribute: style
value: pump
source: product title