<|im_start|>user
What does W stand for in the name W. Rex Black?

Context:
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.<|im_end|>
<|im_start|>assistant
Wilford<|im_end|>
