Original sentence: Liechtenstein claims restitution for 1,600 km² (which is ten times the size of Liechtenstein) of land in the Czech Republic confiscated from its princely family in 1918 by the then newly established state of Czechoslovakia, the predecessor of the Czech Republic; the Czech Republic insists that the power to claim restitution does not go back before February 1948, when the Communists seized power; Liechtenstein did not diplomatically recognize the Czech Republic until 2009, and the Czech Republic in turn did not diplomatically recognize Liechtenstein
Edited sentence: Liechtenstein claims restitution for  (which is ten times the size of Liechtenstein) of land in the Czech Republic confiscated from its princely family in 1918 by the then newly established state of Czechoslovakia, the predecessor of the Czech Republic; the Czech Republic insists that the power to claim restitution does not go back before February 1948, when the Communists seized power; Liechtenstein did not diplomatically recognize the Czech Republic until 2009, and the Czech Republic in turn did not diplomatically recognize Liechtenstein