Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Fender 80/20 Bronze Acoustic Strings, Ball End, 70XL .010-.048 Gauges - 3-Pack
Product description: Now offering many of our best-selling strings in convenient 3 packs. Fender has been the instrument of choice for many of the greatest musicians since 1946. Our popularity through the generations is a result of our design innovations and commitment to quality. These strings reflect this legacy and are worthy of the Fender name. If you're looking to brighten up that acoustic tone, Fender 80/20 bronze strings deliver articulate sound and great feel, making them perfect for an acoustic guitar with a naturally dark tone. Made from 80% copper and 20% zinc, these strings will not only bring your acoustic sound to life, but also last throughout the most enduring performances.70XL - .010, .014, .022, .030, .040, .04870CL - .011, .015, .023, .032, .042, .05270L - .012, .016, .024, .032, .042, .052, Now offering many of our best-selling strings in convenient 3 packs. Fender has been the instrument of choice for many of the greatest musicians since 1946. Our popularity through the generations is a result of our design innovations and commitment to quality. These strings reflect this legacy and are worthy of the Fender name.If you're looking to brighten up that acoustic tone, Fender 80/20 bronze strings deliver articulate sound and great feel, making them perfect for an acoustic guitar with a naturally dark tone. Made from 80% copper and 20% zinc, these strings will not only bring your acoustic sound to life, but also last throughout the most enduring performances.70XL - .010, .014, .022, .030, .040, .04870CL - .011, .015, .023, .032, .042, .05270L - .012, .016, .024, .032, .042, .052
Product feature: Ball-end design, Available in multiple gauges, 3-Pack
Product price: $16.74
Product brand: Fender
Target attributes: Winding Material
Answer: attribute: winding material
value: 80/20
source: product description
attribute: winding material
value: 80%
source: product description
attribute: winding material
value: 80/20 bronze
source: product description
attribute: winding material
value: 80/20 bronze
source: product title