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: Apple MacBook Pro 17.0-Inch Laptop 2.8GHz / 8GB DDR3 Memory / 1000GB SSHD (Solid State Hybrid) Drive / OS X 10.10 Yosemite / High-Resolution Display / DVD Burner
Product feature: 2.8 GHz Dual-Core 64-bit processor / Authentic 85W MagSafe Power adapter, 8GB DDR3 Fully tested memory / 1000GB SSHD (Solid State Hybrid) Drive (Brand New), Fresh installation of OS X v10.10 Yosemite / Factory reset / 7 hour battery, 17.0 inch LED-backlit display 1920x1200 resolution, Three USB ports, one Mini DisplayPort, one FireWire, Airport Wifi Card
Product brand: Apple Computer
Target attributes: Screen Size
Answer: attribute: screen size
value: 17.0 inch
source: product feature
attribute: screen size
value: 17.0-inch
source: product title