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: Acer AO1-132-C129 N3060 1.6G 4GB 32GB 11.6" 11AC W10H Laptop (NX.SHPAA.003;AO1-132-C129)
Product description: The Acer Aspire One 11 AO1-132-C129 11.6" notebook in black/white, has Intel Celeron dual core N3060 1.6 GHz processor with the standard memory of 4GB DDR4 SDRAM, so you can simultaneously run multiple software programs and perform memory intensive tasks. The laptop has 32GB flash memory, a storage device that supports reading and writing data and maintains stored data in a permanent state. This laptop operates on Windows 10 Home with 64-bit memory and supports Intel HD graphics 400, for editing images, videos and for gaming applications. This laptop supports IEEE 802.11a/b/g/n/ac Wi-Fi and Bluetooth 4.0 technology for wireless connectivity. The laptop is suitable for business environments to keep your files safe and secure.
Product feature: Win 10 Home 64-bit, 11.6" 1366 x 768 ( HD ), Celeron N3060 / 1.6 GHz, 4 GB RAM + 32 GB eMMC, Integrated Intel HD Graphics400
Product brand: Acer
Target attributes: Screen Size
Answer: attribute: screen size
value: 11.6"
source: product description
attribute: screen size
value: 11.6"
source: product title
attribute: screen size
value: 11.6"
source: product feature