Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Case Logic 17-Inch Laptop and Tablet Briefcase, Black (DLC-117)
Product description: Modernized for today's casual professional, this asymmetrically quilted case carries a laptop, tablet and your business needs within a deep black exterior highlighted with red accents.
Product feature: Elevated, nylex-lined, padded pocket protects up to a 10.1 inch tablet, Organization panel inside the front pocket stores your cell phone, iPod and business essentials while also allowing plenty of space for power cords, Zippered back panel pocket with integrated smartphone slip pocket provides discrete storage for items you want to keep close at your side, Fits devices 15.4 x 1.2 x 10.5 inches
Product price: $6.80
Product brand: Case Logic
Target attributes: Design
Answer: attribute: design
value: None
source: None