Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: LG Rumor Touch LN510 Sprint Cell Phone (PURPLE)
Product description: IM and Sprint Mobile E-mail, 2.0 Megapixel Camera and Camcorder, Music Player, Bluetooth Connectivity, Large Responsive Touch Screen, microSD Memory Slot for Extra Storage (memory card not included).
Product feature: 3" Touch Screen, Full QWERTY Keyboard, 2 Megapixel Camera & Camcorder, CLEAN ESN W SPRINT USA Network ONLY
Product brand: LG
Target attributes: SIM Slots
Answer: attribute: sim slots
value: None
source: None