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: TWZ True 16 Gauge 50' Feet Black PVC Super Flex Speaker Wire for Home/car Audio
Product description: True Gauge Black PVC Super Flexible Jacket Speaker Wire CCA (Copper Clad Aluminum)70% Copper and 30% Aluminum 50 feet spool For Car and Home Audio
Product feature: True Gauge, Black PVC Super Flexible Jacket Speaker Wire, CCA (Copper Clad Aluminum), 70% Copper and 30% Aluminum, 50 feet spool
Product brand: The Wire Zone
Target attributes: RCA Plug Type
Answer: attribute: rca plug type
value: None
source: None