Complex sentence: He also felt that Hungary benefited through continued unity with wealthier, more industrialized Austria, and that the Compromise would end the pressures on Austria of continually choosing between the Magyar and Slav populations of the Kingdom of Hungary.
Split into simpler sentences: He also felt that Hungary benefited through continued unity with wealthier, more industrialized Austria. Further, Deák believed that the Compromise would end the pressures on Austria of continually choosing between the Magyar and Slav populations of the Kingdom of Hungary.