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: O'Neill Women's Tiki Ti wedge sandal Wedge Sandal
Product description: Eva wedge with faux Nubuck straps, stamped eva outsole
Product feature: 100% Faux Leather, Imported, Synthetic sole, Heel measures approximately 2.5", Platform measures approximately 1. inches, stamped eva outsole, Package Dimensions: 9.5 x 6.4 x 2.7 inches, Shipping Weight: 7.2 ounces, ASIN: B011A9B53U, Item model number: Tiki Ti wedge sandal, Date first listed on Amazon: January 5, 2016, Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 4.6 out of 5 stars 6 customer reviews
Target attributes: Heel Style
Answer: attribute: heel style
value: wedge
source: product title
attribute: heel style
value: wedge
source: product feature
attribute: heel style
value: wedge
source: product description