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: HP 671869-002 109-C07751-20 ATi Radeon 7450A Exige 4 MXM-A Graphics Card
Product description: HP 671869-002 109-C07751-20 ATi Radeon 7450A Exige 4 MXM-A Graphics Card Manufacturer: HP Part Number: 671869-002 M/PN: 109-C07751-20 Compatible Model: HP
Product feature: HP 671869-002 109-C07751-20 ATi Radeon 7450A Exige 4 MXM-A Graphics Card, Manufacturer: HP, Part Number: 671869-002, M/PN: 109-C07751-20, Compatible Model: HP
Product brand: HP
Target attributes: Video Memory Type
Answer: attribute: video memory type
value: None
source: None