Translation:I don't know where he is, but I know where his brother is.
This still feels like a frustratingly long sentence for an A1-level type what you (should) hear exercise. I would expect something this complex to be reserved for farther down in the tree. Mid-level at least. I'm still only just a little better than a monkey with a keyboard at this point of the process. ;)
I'm also at level 8 as I post this and understood it fine reading it, but Ward.Joshua got it as a "Type what you hear" exercise. No hints on those. And oh man, if I were in a hurry, I might skip that and take the hit rather than even try. :D
"Type what you hear" are actually my favorite exercises, provided I've actually learned all the vocab in them.