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: Samsung Galaxy Nexus LTE L700 Sprint CDMA Android Cell Phone - Grey
Product description: The Galaxy Nexus by Samsung is one of the first phones from Sprint to run the Android 4.1, Jelly Bean platform. The lock screen, widgets, notifications, multi-tasking and everything in between has been rethought and refined to make Android simple, beautiful and beyond smart. Your apps, music, documents, photos and contacts are stored safely in the cloud, so if your phone is lost, your content is safe.
Product feature: 2G: CDMA 800 / 1900MHz, 3G: CDMA2000 1xEV-DO, 4G: LTE 1900 MHz, Dual-core 1.2 GHz CPU, 1GB RAM, 32GB Storage, 4.65" Super AMOLED capacitive touchscreen with Scratch-resistant glass, Dual Cameras with LED Flash, 5MP Rare with face detection and auto focus, 1.3MP Front, 1850 mAh battery, up to 7 hours 30 min talk time, GPS, NFC, Wi-Fi Hotspot enabled
Product brand: Samsung
Target attributes: Operating System
Answer: attribute: operating system
value: android
source: product description
attribute: operating system
value: android
source: product title