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: LG OEM Original Part: EAD61273106 Composite Cable to 3.5MM Stereo Jack
Product description: LG OEM Original Composite Cable to 3.5MM Stereo Jack
Product feature: LG OEM Original Composite Cable, Cable to 3.5MM Stereo Jack, LG OEM Original Stereo Replacement Parts, Stereo Cable
Product brand: LG
Target attributes: Audio Channels
Answer: attribute: audio channels
value: stereo
source: product description
attribute: audio channels
value: stereo
source: product feature
attribute: audio channels
value: stereo
source: product title