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: Howard Lighting EP2/39HO/PRS/MV 2 Lamp F39T5HO Electronic Ballast
Product description: Howard Lighting EP2/39HO/PRS/MV 2 Lamp F39T5HO Electronic Ballast 39Watt Program Rapid Start T5 Multi Volt
Product feature: UL Listed, Operates on 120-277V AC Circuits, Sound class rated A, 0F minimum lamp starting temperature for primary lamp, Primary Lamp Bulb F39T5HO
Product brand: Howard Lighting
Target attributes: Type
Answer: attribute: type
value: ballast
source: product description
attribute: type
value: ballast
source: product title