There is no grammatical mistake in the given sentence, but it is somewhat vague. It is not clear what is meant by the phrase "the horse wasn't good." A more precise description of the horse's condition, characteristics or behavior would be useful.
The man had bought a horse but the horse wasn't good
### Instruction:
Identify the mistakes in the given sentence and explain why it is wrong

### Input:
The man had bought a horse but the horse wasn't good

### Response:
