What does W stand for in the name W. Rex Black?
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 does W stand for in the name W. Rex Black?

### Input:
Wilford Rex Black (January 31, 1920 – December 12, 2012) was an American politician.

Wilford Rex Black represented the 2nd Utah Senate District from 1973 to 1997. W. Rex Black, as he was often referred to, was a member of the Democratic party and represented the party as the Minority leader in the Utah Senate for many years.

### Response:

Wilford Rex Black (January 31, 1920 – December 12, 2012) was an American politician.

Wilford Rex Black represented the 2nd Utah Senate District from 1973 to 1997. W. Rex Black, as he was often referred to, was a member of the Democratic party and represented the party as the Minority leader in the Utah Senate for many years.
Wilford