Which years was the Tour de France not raced?
The Tour was not contested in 1915, 1916, 1917 and 1918 due to World War 1. It was again postponed from 1940 through 1945 due to World War 2.
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: Which years was the Tour de France not raced?
### Input: 
### Response: The Tour was not contested in 1915, 1916, 1917 and 1918 due to World War 1. It was again postponed from 1940 through 1945 due to World War 2.