Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Nokia Lumia 2520 Quad Core Ultra Thin 0.35-in Full HD 1920x1080 4G LTE Tablet, Black (Verizon Wireless No Contract) 2GB 32GB
Product description: Create and edit Word, Excel and PowerPoint files on the go. Sync your email and calendars with Outlook. And with up to 64GB of expandable memory and OneDrive, you can save your documents and pick up where you left off whenever you want. The Nokia Lumia 2520 with high-res Full HD display is crisp and clear even in bright sunlight. So you can see whatever youre working on, wherever youre working, indoors or outside.Snap on the Power Keyboard and let your fingers do the talking. With up to five hours of extra battery life, a touch pad and two full-sized USB ports, getting things done on the move has never been easier.
Product feature: 10.1" 1920 x 1080 Display, 2GB RAM, 32GB Storage, Quad-Core Snapdragon 800 ( 2.2GHz), Windows RT 8.1
Product brand: Nokia
Target attributes: Network Connectivity
Answer: attribute: network connectivity
value: 4g lte
source: product title