Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Thomastik-Infeld AC111 Acoustic Guitar Strings - Plectrum Series 6 String Set E, B, G, D, A, E
Product description: Genuine Thomastik-Infeld Product; Used by Students and Professionals around the world; Made in Austria
Product feature: Used by Students and Professionals around the world, This set includes: .011, .014, .019, .027, .036, .050, Genuine Thomastik-Infeld Product
Product price: $22.99
Product brand: Thomastik-Infeld
Target attributes: Winding Material
Answer: attribute: winding material
value: None
source: None