In this task, you need to classify the sentiment of the given sentence as either positive or negative.
I am so frustrated right now.
The sentiment of the given sentence is negative.
Complete the following task based on the instruction and optional input provided.### Instruction:
In this task, you need to classify the sentiment of the given sentence as either positive or negative.

### Input:
I am so frustrated right now.

### Output:
The sentiment of the given sentence is negative.