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

Input:
Product title: Lenovo Y50 Full HD 15.6" Core i7 GTX 860M Notebook
Product description: Lenovo Y50 Full HD 15.6" Core i7 GTX 860M Notebook Product Lenovo Y50 15.6" Notebook The Lenovo Y50 15.6" Notebook is crafted with the finest features and powerful technology that deliver excellent computing experience. It boasts a powerful Intel Core i7-4700MQ 2.4GHz Processor which gives you a brilliant multitasking performance. This PC runs in Windows 8.1 Pro 64-Bit that provides greater security and improved power efficiency, giving you quick access to applications. Plus, get more space for games, HD movies and demos as it comes with a 1TB HDD. Also, its 16GB DDR3L gives you outstanding speed, which enables you to control your applications with ease. Hurry! Get your Lenovo Y50 15.6" Notebook today!
Product feature: Intel Core i7 4700HQ 2.4GHz, 16GB Memory 1TB HDD, 4GB GeForce GTX 860M, Full HD 1920 x 1080 15.6", Windows 8.1 Pro 64-bit
Product brand: Lenovo
Target attributes: Screen Size
Answer: attribute: screen size
value: 15.6"
source: product feature
attribute: screen size
value: 15.6"
source: product title
attribute: screen size
value: 15.6"
source: product description