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: Fits Ford Crown Victoria 1992-1997 Speaker Upgrade Harmony R68 R69 Package New
Product description: This Package Includes the Following Items:, Harmony Audio HA-725512 Ford, Lincoln & Mercury Factory Speaker to Aftermarket Harness Pair:, Harmony HA-R68 Rhythm 225 Watt 6x8" 5x7" Speakers:, Harmony HA-R69 Rhythm 450 Watt 6x9" Speakers:
Product feature: Fits Ford Crown Victoria 1992-1997 Speaker Upgrade Harmony R68 R69 Package New
Product price: $104.95
Product brand: Harmony Audio
Target attributes: Channels
Answer: attribute: channels
value: None
source: None