“You might be thinking that the best course of action would be to make sure that any such generative AI is completely unable to spew out any kind of untoward content. Just do whatever ... AI trickery is needed to ensure that the good stuff is emitted and the bad stuff is kept under lock and key. ... The rub is that trying to simultaneously have generative AI that appears to be fluent and capable in composing natural language and yet also can refrain from emitting the bad stuff is a lot harder of a problem than you might assume.” — Lance Eliot, Forbes, 1 May 2023

这段话来自《韦氏词典》Word of the day，文中的 a lot harder of a problem 什么结构。还请专家老师帮忙解答！