Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: AMD A4-Series A4-3300 APU with AMD Radeon 6410 HD Graphics 2.5GHz 1MB Dual-Core CPU Processor AD3300OJZ22HX Socket FM1
Product description: Condition Note: Used AMD A4-Series A4-3300 Desktop CPU Processor Model: AD3300OJZ22HX Socket: Socket FM1 Cores: 2 Frequency: 2.5GHz
Product feature: AMD A4-Series A4-3300 Desktop CPU Processor, Model: AD3300OJZ22HX, Socket: Socket FM1, Cores: 2, Frequency: 2.5GHz
Product brand: AMD
Target attributes: TDP
Answer: attribute: tdp
value: None
source: None