Simplify the following text for a Grade 7 native English-speaking person.
Original: Austria-Hungary was geographically the second largest country in Europe after the Russian Empire ( 621538 k in 1905 ) , and the third most populous ( after Russia and the German Empire ) .
Simplified: Austria-Hungary was the second largest country in Europe ( after the Russian Empire ) . It had the third most people ( after Russia and the German Empire ) .