"I have not yet received information about what happened."

Translation: Mi ankoraŭ ne ricevis informon pri kio okazis.

[jimnice]

The word order confuses me a bit ¨pri tio, kio okazis...about that, what happened.¨ Is this type of construction common? Anyone care to clarify?

[summertimesend]

Liken it to English: "About that which happened"; about that [thing] which happened.

[deactivated user]

But why are both correct? "...about that which happened." and "...about what happened"? They are very different.

[mizinamo]

What difference in meaning do you see?

[deactivated user]

The meaning is basically the same; I was talking about the grammar (?) or perhaps that is sentence structure. If it is both, is there a difference in use? If it is only one, which one and why?