Automatically detect and classify from the following text if it is expressing a positive or negative sentiment:
The customer service was terrible and it took them an hour to answer my question.
The sentiment expressed in this text is negative.
Complete the following task based on the instruction and optional input provided.### Instruction:
Automatically detect and classify from the following text if it is expressing a positive or negative sentiment:

### Input:
The customer service was terrible and it took them an hour to answer my question.

### Output:
The sentiment expressed in this text is negative.