Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: EPS Compatible Replacement for Konica Minolta Magicolor 1600W, 1680MF, 1690MF,High Yield Pack of 4 Remanufactured toner cartridges(A0V30HF,A0V30CF,A0V306F,A0V301F)
Product description: MINOLTA MAGICOLOR 1600,1680,1690 FULL SET OF 4 COLORS
Product feature: Type : Premium Compatible Toner Cartridges w/ LIFETIME WARRANTY, 24/7 customer support, This replacement toner cartridge is built to ISO9001 and ISO14001 Factory Standards., MAGICOLOR 1600W MAGICOLOR 1650 MAGICOLOR 1680 MAGICOLOR 1690
Product price: $57.87
Product brand: EPS
Target attributes: Type
Answer: attribute: type
value: toner cartridges
source: product title
attribute: type
value: toner cartridge
source: product feature
attribute: type
value: toner cartridges
source: product feature