能帮我看看这两个句子是宾语从句吗

都是宾语从句：
1、第一个省略了that：You said （that）you couldn't understand people who talked fast.
在不影响句子意思 情况下可以省略that,另外 who talked fast.是定语从句,修饰 people.这个句子就是宾语从句里面套了一个定语从句.
2、what his problem was,这个是宾语从句.