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: Faber-Castell Basic Black Fountain Pen (Leather Broad)
Product description: Adding a new dimension to writing Faber-Castell created the Basic Black Fountain Pen. This writing marvel is formed with unique barrels in a variety of finishes. The basic black fountain pen is just as convenient and functional as it is attractive making it a great choice for everyday writing. Your hand will enjoy the unique textures of the barrels covered in black leather or carbon fiber. Each barrel offers a distinctive feel that makes writing an exceptional and joyful experience. The basic black pen offers a ribbed, soft-touch grip for exceeding comfort and control. The basic black fountain pen features an outstanding steel nib and a window to observe your ink level. The fountain pen accepts cartridges only. Faber-Castell Basic Black Fountain Pen Features: Unique barrel textures Soft-touch grip for comfort Window to observe your ink level Steel nib Accepts cartridges only
Product feature: Unique barrel textures, Soft-touch grip for comfort, Steel nib, Accepts cartridge refills, Window to observe your ink level
Product price: $40.00
Product brand: Faber-Castell
Target attributes: Ink Color
Answer: attribute: ink color
value: black
source: product title
attribute: ink color
value: black
source: product description