Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Samsung UN43JU640D 43-Inch 4K Ultra HD Smart LED TV (Certified Refurbished)
Product description: With 4K UHD resolution youll enjoy a picture with 4X the detail of Full HD. Enjoy incredible shades of color, as nature intended, with technology that accurately blends primary and secondary colors for spectacular picture performance. Watch and play your way with the advanced Samsung Smart TV platform that lets you quickly and easily access your favorite content., Amazon Renewed is your trusted destination for pre-owned and refurbished products that are inspected and tested to work and look like new. A Renewed supplier who is Amazon-qualified and performance managed, performs a full diagnostic test, replaces any defective parts, and thoroughly cleans the product. The products will have minimal to no signs of wear, no visible cosmetic imperfections when held 12 inches away, and may arrive in a brown or white box with relevant accessories that may be generic., This product comes with a minimum 90-day supplier-backed warranty An Amazon qualified supplier will provide a replacement or refund within 90 days of your receipt if the product does not work as expected. The warranty is in addition to Amazon's standard return policy. Learn more, Shop for smartphones, computers, laptops, tablets, home and kitchen appliances, game consoles, office products, and more on Amazon Renewed .
Product feature: This Certified Refurbished product is factory refurbished, shows limited or no wear, and includes all original accessories plus a 90 day factory warranty., 43-inch Class 4K LED HDTV (42.5" diagonal), Refresh Rate: 120CMR (Effective) (60Hz), Backlight: LED; Smart Functionality: Yes, Built in Wi-Fi: Yes, Inputs: 3 HDMI, 2 USB
Product brand: Samsung
Target attributes: HDTV Format
Answer: attribute: hdtv format
value: ultra hd
source: product title
attribute: hdtv format
value: 4k
source: product description
attribute: hdtv format
value: uhd
source: product description
attribute: hdtv format
value: 4k
source: product feature