Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Samsung UN40KU6300 40-Inch 4K Ultra HD Smart LED TV (2016 Model)
Product description: Enjoy 4K Ultra HD resolution and High Dynamic Range (HDR) content that delivers greater clarity with Micro Dimming Pro and a fuller spectrum of color with Wide Color Enhancer. Access your favorite content quicker and easier with the new Samsung Smart TV platform powered by a Quad-Core Processor.
Product feature: 4K UHD resolution provides 4x sharper picture than full HD; Built-in Wi-Fi for Smart TV capabilities, PurColor brings you closer to what nature intended with accurate expression of color in life-like detail; 3 HDMI, 2 USB, UHD Dimming puts you in the forefront of advancements in color, contrast, and sharpness. It uses new technology to create a more vibrant viewing experience than youve ever seen, Upscaling Picture Engine upgrades lower resolution movies and TV shows to a stunning near ultra high-definition experience with enhanced detail and optimized picture quality, Dimensions (W x H x D): TV without stand: 36.1" x 21.1" x 2.5", TV with stand: 36.1" x 23.5" x 11.3", 4K UHD Picture Quality, Smart Remote, PurColor, UHD Dimming, Simplified Smart TV Experience, CEA 4K UHD Certified
Product brand: Samsung
Target attributes: Refresh Rate
Answer: attribute: refresh rate
value: None
source: None