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: Northlight 2ct Transparent Clear Glass Ball Christmas Ornaments 4" (100mm)
Product description: 2-piece set. Color: clear This special club pack will allow you to build your collection quickly and decorate with more possibilities. Balls are equipped with silver ornament caps (ornament hooks are not included). Ornament caps are removable and have a 0.75" diameter opening at the top Dimensions: 4" (100mm) diameter. Material(s): glass/metal hanger
Product feature: Glass, decorative
Product brand: Northlight
Target attributes: Material
Answer: attribute: material
value: glass
source: product title
attribute: material
value: glass
source: product feature
attribute: material
value: glass
source: product description