请看这一句：
There is nothing that high school students like can come up with that has not already been investigated.
出自Kindaichi V2P137.
请问最后的“that has not already been investigated.”怎么理解，它是谁的从句？
There is nothing that high school students like can come up with that has not already been investigated.
出自Kindaichi V2P137.
请问最后的“that has not already been investigated.”怎么理解，它是谁的从句？
