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: Milesline Women's Shoe Cute Bow Low Flat Heel Multi Color Oxford
Product description: This cute oxford is perfect for school uniforms or for those who want to convey "school girl" style. It features a durable upper with classic oxford perforation details and slip-on style for a great fit, padded insole for comfort, and a lightweight, flexible outsole. Manmade materials.
Product feature: Leather, Rubber sole, Bow, Round toe, Slip-on style, Soft PU Leather, 1.18 inch heel, ASIN: B01FHOELVM, Item model number: WLL0429-4New-Black-9.5, Date first listed on Amazon: May 11, 2016, Average Customer Review: 3.5 out of 5 stars 30 customer reviews
Product brand: Milesline
Target attributes: Silhouette
Answer: attribute: silhouette
value: oxford
source: product description
attribute: silhouette
value: oxford
source: product title