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: Motorola W315 - Alltel
Product description: The Motorola W315 is a PEBL inspired rounded clamshell design CDMA cell phone. This is a basic phone built on reliability, some of it's features include GPS, voice dialing, speakerphone, BREW and SMS. This phone has excellent reception, crisp LCD display and great interface. The W315 Flip phone is designed to make excellent sound quality while offering an easy, portable, lightweight product.
Product feature: This product has been carefully audited and is certified to be 100% functional., This offer includes the following accessories 1. Battery 2. Battery Cover (if applicable) 3. Wall Charger, This offer includes the following accessories 1. Battery 2. Battery Cover (if applicable) 3. Wall Charger, Ready for activation on the Alltel network, Perfect for those that don't need all the frills of a smartphone. This device is reliable and easy to operate.
Product brand: Motorola
Target attributes: Weight
Answer: attribute: weight
value: None
source: None