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: EVGA GeForce 9500 GT 1024 MB DDR2 PCI Express 2DVI/HDTV SLI Ready Graphics Card, 01G-P3-N959-TR
Product description: EVGA nVidia GeForce 9500GT 1GB 2DVI PCI-Express Video Card
Product feature: Chipset: GeForce 9500 GT Engine Clock: 550 MHz, Video Memory: 1GB DDR2 Memory Clock: 1 GHz Memory Interface: 128-bit, Memory Bandwidth: 16 GB/s, RAMDAC: 400 MHz Stream Processors: 32, Connectors: Dual DVI-I, TV-out (HDTV ready), Bus: PCI-Express x16 (PCI Express 2.0 Supported), Thermal: Fansink, Max. Resolution: 2560 x 1600
Product brand: EVGA
Target attributes: Power Connectors
Answer: attribute: power connectors
value: None
source: None