求助如何检索所有非限定性关系从句

ilovecorpu

初级会员
The typical infinite relative clauses are characterized by the occurence of ",which". Meanwhile,other occurences such as "all of which, the tail of which,....." are also seen as infinite relative clauses. Will anybody be kind enough to show me how to retrieve all the infinite relative clauses by means of the software, PowerGREP? What I need is the regular expression. Many thanks in advance.
 
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