How long does the train journey from Pamplona to Madrid take ?
When does________________________
I don't know where he lives
Where ____________________________--
How long does the train journey from Pamplona to Madrid take ? => When does the train journey from Pamplona to Madrid over? I don't know where he lives. => Where does he live?
How long does the train journey from Pamplona to Madrid take ? When does the train journey from Pamplona to Madrid take ? *) How long ≈ when I don't know where he lives Where does he live?