Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: ASUS EN7950GT/HTDP/512M/A NVIDIA GeForce 7950GT 512MB 256-bit GDDR3 PCI-Express x16 HDCP SLI Video Card w/2*DVI, HDTV
Product description: ASUS EN7950GT/HTDP/512M/A PCI Express x16 Video adapter, NVIDIA GeForce 7950GT GPU, 550MHz Core Clock, 24 PixelPipelines, 512MB 256-bit GDDR3 Memory, 1400MHz Effective Memory Clock, DirectX 9.0 and OpenGL 2.0 supported, 2 x DVI, 1 x HDTV / S-Video / Composite Out, 400MHz RAMDAC, Max Resolution 2048 x 1536, SLI Support, Cooler With Fan, HDCP Ready, NVIDIA CineFX 4.0 engine, NVIDIA Intellisample 4.0 technology, Digital Vibrance Control 3.0 Technology, NVIDIA nView multi-display technology, NVIDIA UltraShadow II technology, True high-dynamic range lighting effect and PureVideo technology
Product feature: NVIDIA GeForce 7950GT GPU, 550MHz Core Clock, 512MB 256-bit GDDR3 Memory, 1400MHz Memory Clock, 2048 x 1536 Resolution, HDCP ready, 2 x DVI, 1 x HDTV-Out, SLI support, PCI Express x16 interface, NVIDIA CineFX 4.0 Engine
Product price: $248.75
Product brand: Asus
Target attributes: DVI Output Type
Answer: attribute: dvi output type
value: None
source: None