问句子结构i tend to believe that the benefits brought about by this debate override its drawbacks.
问句子结构：
I tend to believe that the benefits brought about by this debate override its drawbacks.
I tend to believe that后面应该是宾语从句,那么the benefits brought about by this debate override its drawbacks中,brought about by this debate 是不是the benefits的定语从句?
如果以上都是理解的对的话,我的问题主要出在：为什么不是：
I tend to believe that the benefits that were bring about by this debate override its drawbacks.