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: SanDisk 4GB microSD Memory Card for Samsung Omnia i910 i900, Renown U810, Saga i770, Eternity A867, SGH-A777, Gravity T459, Behold T919, Delve R800, A767 Propel, i907 Epix, R550 JetSet, U650 Sway, M540 Rant, M630 Highnote, A637, A837 Rugby, M800 Instinct, U940 Glyde Cell Phone
Product description: With SanDisk's microSD card, your mobile content is no longer tied to your phone. Share your content collections with friends, family and colleagues easily with this removable storage solution specifically designed for mobile phones with expansion slots. SanDisk's microSD memory card also helps you move data between phones. If you're changing service or upgrading your handset, the microSD lets you easily transfer phone lists, settings or ring tones. Its ultra-small size consumes very little power from your handset, to give you longer battery life on your phone.
Product feature: Brand new SanDisk memory card., Type: microSD card., Capacity: 4GB, Standardized: complies with SD card specification standards, Ultra-Portable: extremely small footprint design
Product brand: SanDisk
Target attributes: Capacity
Answer: attribute: capacity
value: 4gb
source: product title
attribute: capacity
value: 4gb
source: product feature