Construct a sentence with the word "ultimatum".
After weeks of failed negotiations, the workers' union issued an ultimatum to the management, demanding better wages and working conditions.
Below is an instruction that describes a task, write a response that appropriately completes the request.

### Instruction:
Construct a sentence with the word "ultimatum".

### Response:
After weeks of failed negotiations, the workers' union issued an ultimatum to the management, demanding better wages and working conditions.