Identify what is the area of expertise of the given sentence from the list of options.
Donald Trump was impeached on December 18, 2019.
The area of expertise of this sentence is 'Politics'.
Complete the following task based on the instruction and optional input provided.### Instruction:
Identify what is the area of expertise of the given sentence from the list of options.

### Input:
Donald Trump was impeached on December 18, 2019.

### Output:
The area of expertise of this sentence is 'Politics'.