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: Datacomm 450002WH-3 2 Gang Recessed Low Voltage Cable Plate, 3 Pack
Product description: Ensure a professional look and finish to any low-voltage cable installation using this Double Gang Recessed Wall Plate which keeps cables from hanging in plain sight. This plate mounts flush to your wall with a recessed opening that sends A/V cables, data lines, and phone lines inside the wall and out of sight. Once inside your wall the cables can be run to your entertainment cabinet, entertainment center, equipment rack or closet, computer or other location that will complete the connection. A second Double Gang Recessed Wall Plate can be purchased separately as a pair. Using this wall plate makes for an easy, clean way to access cables and finish the connection and installation.
Product feature: Can be installed with the opening facing up or down, Designed to be used with 2-gang low voltage mounting brackets made by any major manufacturer, With these new plates you can install low voltage cables behind your flat panel TV, your amplifier flush to the wall surface, Allows cable management internally rather than externally, 3 Pack
Product price: $2.00
Product brand: Datacomm
Target attributes: Plate Size
Answer: attribute: plate size
value: 2-gang
source: product feature
attribute: plate size
value: 2 gang
source: product title
attribute: plate size
value: double gang
source: product description