What was the main treaty that marked the end of World War I?
The main treaty that marked the end of World War I was the Treaty of Versailles.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What was the main treaty that marked the end of World War I?
### Input: 
### Response: The main treaty that marked the end of World War I was the Treaty of Versailles.