專有名詞(/姓名)不能接限定關係子句。一個錯誤句子：
有一個例外
（未完）
Source:
"The other is that cleft sentences may have a proper noun as a focus element, whereas restrictive relative clauses cannot have a proper noun as an antecedent.... It's Chelsea (that) he lives in...." -- 18.28n, A Comprehensive Grammar of The English Language by Quirk et al.
