How to say in Czech: Where do they know him from?

English
Where do know from?
Czech
Odkud ho znají?
Where are you going?
Do they understand him?
They do not know him.
Where do I buy a ticket?
They have known him for a long time.
They know him well.
They would like to get to know him better.
Everybody wants to get to know him.
I got to know him when I was a student.
Did they miss him?

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