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

Input:
Product title: D'Addario HBN-3T Pro-Arte Hybrid Carbon G/B Classical Guitar Half Set, Normal Tension
Product description: HBN-3T, normal tension, is a hybrid treble classical half set made up of D'Addario's laser sorted clear nylon E string, paired with a Carbon B/G string. D'Addario Half Sets provide the flexibility for each player to customize their own sound and feel. Choose from a wide range of material combinations to create the voice of your instrument. Each set contains 3 treble or bass strings in a convenient reseal able pouch
Product feature: NEW! Hybrid Carbon Half Set, Clear Nylon E string with a Carbon G/B, Normal Tension, String Gauges .0280, .0272, .0331
Product brand: D'Addario
Target attributes: Core Material
Answer: attribute: core material
value: clear nylon
source: product description
attribute: core material
value: clear nylon
source: product feature
attribute: core material
value: nylon
source: product description