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

Input:
Product title: Acer AS5745-5425 15.6" Laptop (4GB 320GB Blu-Ray disc drive)
Product description: ACER ASPIRE 15.6 5745-5425 BLU-RAY NOTEBOOK i3 comes with Windows 7 home premium 64-bit Processor : Intel core i3 processor 350M (2.26 GHz, 3Mb L3 cache) 15.6" 16:9 HD LCD (720p, 1366 x 768) Intel HD Graphics 4GB Memory 320GB Hard disk Blu-ray Disc / Super - multi DL Combo drive Multi in 1 card reader 802.11b/g/n Wireless and Built-in webcam 6-cell Li-ion battery.
Product feature: Processor : Intel core i3 processor 350M ( 2.26 GHz, 3Mb L3 cache ), 320GB Hard disk, 4GB Memory, Blu-ray Disc / Super - multi DL Combo drive, Built-in webcam
Product brand: Acer
Target attributes: Screen Size
Answer: attribute: screen size
value: 15.6"
source: product title
attribute: screen size
value: 15.6"
source: product description