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: Maple 16GB USB 2.0 Flash Drive - Single Item - Inlaid Christmas Tree
Product description: From our Antique Collection, we are introducing our special Natural Maple Wooden Flash Drive. The 16GB drive is engraved with a Christmas Tree design and filled with a quality wooden Veneer. Our Antique Collection of Wooden drives are great for artisans, enthusiasts, and gift givers. Works great with laser engraving! For more information, visit us at www.samedayflash.com or call 1-800-879-8273.
Product feature: High Quality Samsung Grade Chipset, High Grade UDP 1 piece chipsets for FASTER read / write speeds, Shock resistant and water proof Chipset, USA Company Based in the Midwest Servicing Clients Everyday, Unique Artistic Design with Wooden Veneer
Product price: $6.95
Product brand: SameDayFlash
Target attributes: Capacity
Answer: attribute: capacity
value: 16gb
source: product title
attribute: capacity
value: 16gb
source: product description