indirect questions

[BestATN@xxx.xxx]

For "John knows who came", why not transform it to 
"John knows the answer to the question 'Who came?' ?" and use something like
la djan. djuno le danfu be lu ma klama 

The equivalent transformation for 
"Johns wonders who came" might be
"John wonders what the answer to the question 'Who came?' is." or
"John wonders about the answer to the question 'Who came?' ." 
la djan. kucli le danfu be lu ma klama

No logic is involved, no kau, just simple transformations.

Why doesn't this work?

Steven