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: Poetic Licence Corporate Beauty Black Floral Womens Heels Shoes
Product description: Outer Material: Leather. Inner Material: Manmade. Sole: Manmade.Closure: Lace Up. Heel Height: 2 inches. Heel Type: Stiletto
Product feature: Fabric, Heel measures approximately 2 inches", ASIN: B014D8K5KO, Date first listed on Amazon: August 24, 2015, Average Customer Review: 5.0 out of 5 stars 2 customer reviews
Product brand: Poetic Licence
Target attributes: Silhouette
Answer: attribute: silhouette
value: stiletto
source: product description