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: Taylor GA6 Maple/Sitka Grand Auditorium Acoustic Guitar 6-String
Product description: Maple/Sitka Grand Auditorium 6-String
Product feature: Shape: Grand Auditorium Back/Side Wood: Big Leaf Maple Top Wood: Sitka Spruce Neck/Heel: Hard Rock Maple Electronics: None Bracing: Forward Shifted Pattern with Relief Rout Binding: Ivoroid Fretboard Wood: Ebony Fretboard Inlay: 4mm Abalone Dots Headstock Overlay: Indian Rosewood Bridge Inlay: None Bridge Pins: Ebony with Abalone Dots Nut & Saddle: Tusq TunersTaylor Gold Truss Rod Cover: Indian Rosewood Back/Side Finish: Gloss T, Back/Side Wood: Big Leaf Maple, Top Wood: Sitka Spruce, Neck/Heel: Hard Rock Maple, Electronics: None
Product brand: Taylor Guitars
Target attributes: Ukulele Type
Answer: attribute: ukulele type
value: None
source: None