<|im_start|>user
What is the first name of the man Evershed crater was named after?

Context:
Evershed is a lunar impact crater on the far side of the Moon, named after the English solar astronomer John Evershed. It is located to the northeast of the larger crater Cockcroft, and to the north of the smaller Van den Bergh.<|im_end|>
<|im_start|>assistant
John<|im_end|>
