英语翻译

问题描述:

英语翻译
We maintain that healthy skepticism about the screening program of cancer that's built on inconclusive data on whether or not we are helping more men than we're hurting.
我知道此句话中的skepticism 接了about这个介词,而后面的 on whether or not we are...中的on 前面接的是哪个名词?是data?还是skepticism?
有一名词在一句话中接两个介词这种用法吗?希望能给出正确解释!

data,因为that's built oninconclusive data 是修饰 the screening program of cancer 的,后面你说的这个on是修饰紧接着的这个data的.