demand something from somebody
demand something of somebody

When these students come to college, they will demand A's in every subject as a matter of right.

Your problems all come when you demand too much of yourself.

The only way is to say what he would demand of himself and the American public.

And so he'd done as she had demanded of him.

I knew the answer without having to demand it of him.

But all that seemed to demand too much of her.

But she would be sure to tell the story they demanded of her.

She didn't want to be with him at the cost it would demand of her.

All that he had demanded of her she took in return.

Obviously there is something wrong here with what companies can demand of their workers.