网友说的这种情况，两种定语从句都可以。分别举例如下：

第一组：

1. I want to help the children, whose parents died in the earthquake.

2. I want to help the children, of whom the parents died in the earthquake.

3. I want to help the children, the parents of whom died in the earthquake.

第二组：

1. We must repair the desks whose legs are broken.

2. We must repair the desks of which the legs are broken.

3. We must repair the desks the legs of which are broken.