Simplify: When he was seven his father died and his mother took him and his sister to live in Nagysz l s (today it is called Vinogradiv and is in the Ukraine), and then to Pozsony (today it is called Bratislava in Slovakia).
Bela's mother then took him and his sister, Erzsebet, to live in Nagysz l s (today Vinogradiv, Ukraine) and then to Pozsony (German