"Qual documento ele apresentou?"

Translation: What document did he present?

[andreaparker]

Can't this be 'Which document....'? If not, how do you differenciate between What + noun, and Which + noun??

[TiagoMoita_PT]

This would have been more accurately translated as "Which document..."
Qual = which; What = que

[Err_Eek]

apresentou was a new word, and its translation only showed the verb "to perform"