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: Toshiba 26AV502U 26-Inch 720p LCD HDTV
Product description: 720p HD LCD TV
Product feature: 720p HD LCD Panel, DynaLight Backlight, TheaterWide Picture Modes, Discrete IR Codes, Vesa Compatible
Product brand: Toshiba
Target attributes: Width
Answer: attribute: width
value: None
source: None