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: Dell XPS 13ULT-4289sLV - 13.3" Full HD Touchscreen Ultrabook - i5 Haswell Haswell / 8GB RAM / 128GB SSD / HD Graphics 4400 / Windows 8.1 (Silver) [Discontinued By Manufacturer]
Product description: The Dell Silver XPS 13 13.3" Full HD 1080p Touchscreen Ultrabook Computer is thin and powerful. Featuring a Full HD 13.3" touchscreen Gorilla Glass NBT display - this ultrabook computer offers enhanced scratch resistance, reduced scratch visibility, and better retained strength once a scratch occurs. Boost productivity with a speedy 4th Gen Intel Core i5 (Haswell) processor and get smooth video from powerful Intel HD 4400 integrated graphics. The XPS 13 Ultrabook boots from cold in as little as 12 seconds. Whatever state your laptop is in, it comes back in a snap, less than 3 seconds when it’s in sleep mode and less than 5 seconds from deep sleep. A 128GB solid-state drive and Intel Rapid Start Technology make it possible. The XPS 13 also comes with 8GB of built-in DDR3L memory to keep things running quickly and smoothly. Stay connected with family,friends and colleagues via the HD webcam and built-in WiFi and Bluetooth connectivity. Enjoy immersive audio via HD Audio with Waves MaxxAudio Pro. Keep working and playing when the lights go down with the backlit keyboard. And don't worry if you spill your drink on it - it's designed to drain liquid away in the event of a mishap. Windows 8.1 gives you the power to quickly browse, watch movies, play games, polish your resume, and pull together a killer presentation. This amazing Ultrabook weighs only 3 pounds and tapers to a quarter-inch thick at its slimmest point so ypu can take it anywhere with comfort. Plus, it's solidly built with a lightweight carbon-fiber base. The 6-cell lithium-ion battery gives enough juice to keep you going for hours.
Product feature: Display: 13.3" Full HD LED (1920 x 1080), 10-finger multi-touch support, CPU: Intel Core i5-4210U (Haswell) up to 2.70 GHz, Memory: 8GB DDR3L SDRAM / 128GB Solid State Drive, Graphics: Intel HD Graphics 4400 with shared graphics memory, Windows 8.1 / WiFi / Bluetooth / Webcam / Backlit Keyboard, Intel Core i5-4210U Processor, 8GB DDR3, 128 GB Solid-State Drive, 13.3-Inch Screen, Intel HD Graphics 4400, Windows 8.1
Product price: $243.66
Product brand: Dell
Target attributes: Refresh Rate
Answer: attribute: refresh rate
value: None
source: None