Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Dell Nvidia GeForce4 MX440 64MB Low Profile SFF AGP Video Graphics Card
Product description: Nvidia's GeForce4 MX Series has just upped the gaming ante! With 64MB of memory and the most integrated GPU known to man the MX440 accelerator board is ready to take you on the supreme ride of your life.
Product feature: 64MB, AGP, DVI, VGA, Low Profile
Product brand: Dell
Target attributes: Length
Answer: attribute: length
value: None
source: None