Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Dell Optiplex Intel Core 2 Duo 2.6 GHz Dual Core, New 6144MB RAM, 250GB HDD, DVD Burner, Windows 7 Professional 64 Bit Computer-(Certified Reconditioned)
Product description: Dell Optiplex Intel Core 2 Duo 2.6 GHz Dual Core, New 6144MB RAM, 250GB HDD, DVD Burner, Windows 7 Professional 64 Bit Computer. New Keyboard and Mouse. New Power Cord.
Product feature: This certified reconditioned product is tested and certified by the manufacturer or by a third-party seller to look and work like new, with some signs of wear!, The reconditioning process includes functionality testing, inspection, and repackaging!, DVD Burner!, New Keyboard and Mouse!, New Power Cord.New 6144MB RAM.
Product brand: Dell
Target attributes: Monitor Resolution
Answer: attribute: monitor resolution
value: None
source: None