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 LN40B540P 40" LCD TV 1080P 3 HDMI
Product description: Offering amazing picture quality in a very elegant frame, the new SAMSUNG LN40B540 combines full HD performanc e, incredible contrast and clarity, all with award-winning design SAMSUNG is famous for. With full HD at 1080p, you can be sure that you're getting the best picture performance for today's HD media and broadcast technology. With an incredible 60,000:1 dynamic contrast ratio, you'll see deeper blacks and enhanced clarity. And with the USB 2.0 feature, you can play your music and view your photos from your USB keys, memory card, and digital devices on your HDTV.
Product feature: 1080p Resolution, 60,000:1 Dynamic Contrast Ratio, Touch of Color design, 6ms Response Time, Energy Star compliant
Product brand: Samsung
Target attributes: Sony Technology Line
Answer: attribute: sony technology line
value: None
source: None