我有一个英语句子,

我有一个英语句子,
25 - 离问题结束还有 7 天 19 小时
我有一个英语句子,
they said they were French,which was not ture.
这是一个定语从句,which指代的是主句,可是请问which指代的是they said they were French呢,还是they were French呢,如果指代不同,含义也就不一样,前者是指他们自称法国人这件事不是真的,后者是指他们是法国人这件事不是真的.那么,到底该如何理解这句话呢,遇到此种句子一般是怎么分析的,