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: Ampeg AMG100CH Wood-Bodied Dan Armstrong Electric Guitar Electric Guitar, Vintage Cherry Finish
Product description: The AMG100 electric guitars are wood-bodied iterations of the Ampeg ADA6 Dan Armstrong Plexi guitar. They feature the same specifications as the ADA6, and are crafted from traditional vintage electric guitar tone woods. With 24 frets clear of the unique symmetrical double cutaway body and the same removable pickup system as the original Dan Armstrong design, they distinguish themselves from all other electric guitars.
Product feature: Custom removable pickups, 3-way tone circuit, 24-fret hard maple neck, Grover nickel tuning machines, Ultra-thin, diamond cut light weight mahogany (Cherry) body
Product brand: Ampeg
Target attributes: Number of Strings
Answer: attribute: number of strings
value: None
source: None