An artist who seeks fame is like a dog chasing his own tail who,结尾怎么加who

题目

An artist who seeks fame is like a dog chasing his own tail who,结尾怎么加who
An artist who seeks fame is like a dog chasing his own tail who,when he captures it ,does not know what else to do but to coninue chasing it .
文中第2个who为什么加结尾,who单词什么时候加结尾,属于什么语法.
does not know what else to do but to continue chasing it 中的but to 怎么翻译解释.

答案

1.第二个who引导定语从句（整个when he captures it ,does not know what else to do but to coninue chasing it 都由第二个who引导）,who后加逗号只是为了停顿,因为后面这个句子太长了,没什么语法.
2.but to意思是：只有